Knight's Mechanical Encyclopedia, P., Pho-to-glyp′tic En-grav′ing.

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19th-Century American

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entry

Table of Contents:

Pach-om′e-ter.

Pack′ag-ing-ma-chine′.

Pack′et-note.

Pack′ing-awl.

Pack′ing-bolt.

Pack′ing-box.

Pack′ing-press.

Pack′ing-ring.

Pack′ing-stick.

Pack-sad′dle.

Pad-crimp press.

Pad′ding-ma-chine′.

Pad′dle-box boat.

Pad′dle-hole.

Pad′dle-pro-pel′ler.

Pad′dle-wheel.

Pad-trace Bear′er.

Pad-u-a-soy′.

Pae-dom′e-ter.

Pag′ing-ma-chine′.

Pail-ma-chine′.

Paint-burn′er.

Pair-horse Har′ness.

Paix ′han gun.

Pal′ate, Artifi′cial.

Pal′ette-knife.

Pal′ier-glis′sant.

Pal′imp-sest.

Pal-la′di-um-izing.

Pallam-poor′.

Pal′let-mold′ing.

Pal-li-asse′.

Palm-leaf loom.

Pan-a-ma′ hat.

Pan-de′an pipes.

Panei-cono-graph.

Pan′el-plane.

Pan′el-rais′er.

Pan-ic′o-graph.

Pan-nus-co′ri-um.

Pan-o-ram′ic Cam′e-ra.

Panste-re-o-ra′ma.

Pan-tel′e-graph.

Pan′to-chro-nom′e-ter.

Pan′to-graph.

Pan-tom′e-ter.

Pa′per-bag ma-chine′.

Pa′per-box ma-chine′.

Pa′per-clamp.

Pa′per cloth.

Pa′per Col′lar.

Pa′per-col′or-ing ma-chine′.

Pa′per-cut′ter.

Pa′per-cut′ting ma-chine′.

Pa′per-en-am′el-ing ma-chine′.

Pa′per-feed′er.

Pa′per floor-cloth.

Pa′per-fold′er.

Pa′per-fold′ing ma-chine′.

Pa′per-hang′ing.

Pa′per hot-press.

Pa′per-knife.

Pa′per-mak′ing ma-chine′.

Pa′per-mold′ing ma-chine′.

Pa′per-mus′lin.

Pa′per-per′fo-rating ma-chine′.

Pa′per-pol′ish-ing ma-chine′.

Pa′per-punch.

Pa′per-rul′ing ma-chine′.

Pa′per-split′ting.

Pa′per-stock Bleach′er.

Pa′per-stock Wash′er.

Pa′per-tube ma-chine′.

Pa′per-twine.

Pa′per Wa′ter-proof′ing Machine′.

Pa′per-weight.

Pa′pier-mache′.

Par-a-bol′ic Il-lu′mi-na′tor.

Par-a-bol′ic Reflect′or.

Par′a-cen-te′ri-um.

Par-a-chute′.

Par-a-chute′--light.

Par-a-chute′--light ball.

Par′a-gran′di-ne.

Par-a-grele′.

Par′al-lel bar.

Par′al-lel file.

Par′al-lel knife.

Par′al-lel lathe.

Par′al-lel Mo′tion.

Par′al-lel Rul′er.

Par′al-lel vise.

Para-ton-nerre.

Par′cel-ing-ma-chine′.

Parch′ment-pa′per.

Par′ing-ma-chine′.

Par′ing-plow.

Paring-scis′sors.

Par-is′ian gold-col′ored Al′loy.

Par-is′ian white-metal.

Pa-risth′mi-o-tome.

Par′lia-ment-heel.

Par′lor-skate.

Pa′ros-mar′ble.

Par′point-work.

Par′ral-rope.

Par′rott-gun.

Part′ing-sand.

Pas-de-sou′ris.

Passe-par-tout′.

Pass′ing-place.

Pasteboard-cut ′ter.

Paste-mak′er.

Pat ′a-mome-ter.

Pa-tel′la-ap′Pa-ra′tus.

Pat ′ent Leath ′er.

Pat ′e-re′ro.

Pa′ter-nos′ter — pump.

Pa′ter-nos′ter-wheel.

Pat ′tern-box.

Pat ′tern-cyl′in-der.

Pat ′tern-makers' Ap-pli′an-ces.

Pat ′tern-wheel.

Pat ′tin-son's pots.

Pa-vil′lon-chi-nois′.

Pav′ing-bee′tle.

Pav′ing-ma-chine′.

Pav′ing-roll′er.

Pav′ing-tile.

Peach-par′er.

Peach-ston′er.

Pea-drop′per.

Peak-hal′yards.

Pea′nut-dig′ger.

Pea′nut-pick′er.

Pearl , Arti-fi′cial.

Pearl-barley ma-chine′.

Pearl-but′ton.

Pearl ′ing-mill.

Pearl-pow′der.

Pea-shell′er.

Peat-burn′ing Furnace.

Peat-cut ′ter.

Peat-ma-chine′.

Peb′ble-pav′ing.

Pedal-or′gan.

Ped′es-tal-cov′er.

Ped′i-ment-ba-rom′e-ter.

Pe-dom′e-ter.

Peel ′ing-i′ron.

Peg-cut ′ter.

Peg′ging-awl.

Peg′ging-ma-chine′.

Peg′ging-ram′mer.

Pei-ram′e-ter.

Pel′le-tan-jet.

Pel-vim′e-ter.

Pely-com′e-ter.

Pen′cil-com′pass.

Pen′cil-sharpen-er.

Pen′dant-wind′ing watch.

Pendu-lous-cylin-der steam-en′gine.

Pen′du-lum-hausse.

Pen′du-lum-lev′el.

Pen′du-lum-pump.

Pen′du-lum-wheel.

Pen′du-lum-wire.

Pen-i-cil′lus.

Pe′nis-syringe.

Pen′nis-tone.

Pen′ta-graph.

Per-am′bu-lator.

Per-ca-line′.

Per′co-la-tor.

Per-cus′sion-cap.

Per-cus′sion-cap Filling-ma-chine.

Per-cus′sion-cap Hold′--er.

Per-cus′sion-cap Trim′ming-ma-chine.

Per-cus′sion-fuse.

Per-cus′sion-grind′er.

Per-cus′sion-lock.

Per-cus′sion-pow′der.

Per-cus′sion-sieve.

Per-cus′sionstop.

Per-cus′sionta′ble.

Per′fect-ing.

Per′fect-ing-press.

Per′fo-rat′ed file.

Per′fo-rated saw.

Per′fo-rat′ing-ma-chine′.

Per′fo-rator, Ob-stet′ric.

Per′i-a′gua.

Pe-ri-od′o-scope.

Peri-os′te-um-el′e-va-tor.

Per′i-scop′ic lens.

Per′ma-nent way.

Per-mu-ta′tion-lock.

Per′pen-dic′u-lar lift.

Per-pet′u-al Mo′tion.

Per-pet′u-al screw.

Per-ro-tine′.

Per′sian Carpet.

Per′sian drill.

Per′sian wheel.

Per-spec′tive-glass.

Per-spec′tive-instru-ment.

Per-spec′to-graph.

Pe-tro′le-um.

Pe-tro′le-um-burn′er.

Pe-tro′le-um-car.

Pe-trole-um-fil′ter.

Pe-tro′le-um-fur′nace.

Pe-tro′le-um-lamp.

Pe-tro′le-um-still.

Pe-tro′le-um-stove.

Pe-tro′le-umtank.

Pe-tro′le-umtest′er.

Pet′ti-coat-pipe.

Pew′ter-er's Sol′der.

Pew′ter-er's Tem′per.

Pha′co-cys′tec-tome.

Phan-tasma-go′ri-a.

Phan′ta-scope.

Pha-ryn′go-tome.

Phena-kis′to-scope.

Pho-nau′to-graph.

Pho′no-graph.

Pho′no-scope.

Phos′phor bronze.

Phos-phor′o-scope.

Phos′pho-rus-paste.

Pho′to-e-lec′tric lamp.

Pho′to-e-lec′tro-type.

Pho′to-en-grav′ing.

Pho′to-gal-van′o-graph.

Pho′to-gel′a-tine Pro′cess.

Pho-to-gen′ic Draw′ing.

Pho-to-glyph′ic En-grav′ing.

Pho-to-glyp′tic En-grav′ing.

Pho′to-graph-e-namel.

Pho-to-graph′ic Cam′e-ra.

Pho-to-graph′ic Cam′e-ra-stand.

Pho-to-graph′ic chair.

Pho-to-graph′ic Cut′ter.

Pho-to-graph′ic head-rest.

Pho-to-graph′ic mi-crom′e-ter.

Pho-to-graph′ic Print′ing.

Pho-togra-phom′e-ter.

Pho-tog′ra-phy

Photo-he′li-o-graph.

Photo-hy-al′o-type.

Pho′to-in-tagl′io En-graving.

Photo-li-thogra-phy.

Pho′to-me-chan′i-cal Print′ing.

Pho′to-me-tallo-graph.

Pho-tom′e-ter.

Photo-mi-cog′ra-phy.

Pho′to-pro′cess-es.

Pho′to-re-lief′ En-grav′ing.

Pho′to-scope.

Pho′to-sculp′ture.

Pho′to-vit′ro-type.

Photo-zin-cog′ra-phy.

Phthon-gom′e-ter.

Pi-a′no-for′te.

Pi-a′no-for′te Ac′tion.

Pi-a′no-for′te Ham ′mer.

Pi-a′no-graph.

Pi-a′no-jack.

Pi-a′no-lock.

Pi-a′no-move′ment.

Pi-a′no-stool.

Pio ′co-lo-flute.

Pick′er-mo′tion.

Pick′er-staff.

Pick′et-clamp.

Pick′et-point′er.

Pick-ham′mer.

Pick′ing cloth.

Pick′ing-peg.

Pick′ing-stick.

Pic′ture-nail.

Pierc′ing-file.

Pierc′ing-saw.

Pierre per-due′.

Pi-e′tra Du′ra.

Pie-zom′e-ter.

Pig′eon, Me-chan′i-cal.

Pig-i′ron Break′er.

Pig′mentprint′ing.

Pile-car′pet.

Piled-fab′ric loom.

Pile-draw′er.

Pile-driv′er.

Pile-fab′ric.

Pile-sup-port′er.

Pile-with-draw′ing ma-chine′.

Pil′lar-block.

Pil′lar-com′pass.

Pil′lar-file.

Pill-ma-chine′.

Pil′low-block.

Pil′low-lace.

Pi-lon′--mill.

Pi′lot-cloth.

Pi′lot-en′gine.

Pinch′ing-bar.

Pinch′ing-nut.

Pinch′ing-pin.

Pinch′ing-tongs.

Pine-leaf Fab′ric.

Pine-wood still.

Pin′ion-file.

Pin′ion-gage.

Pin′ion-wire.

Pink′ing–i′ron.

Pin′ning–in.

Pin–pa′per-ing ma-chine′.

Pipe–clear′er.

Pipe–coup′ling.

Pipe–cut′ter.

Pipe-driv′er.

Pipe-mold′ing.

Pipe-prov′er.

Pipe-slotting punch.

Pipe-sock′et-ing ma-chine′.

Pipe-thread′ing ma-chine′.

Pip′ing-i′ron.

Pi-que′--work.

Pi-ram′e-ter.

Pi-se — work.

Pis′tol-car′bine.

Pis′tol-pipe.

Pis′tol-rout′er.

Pis′ton-bel′lows.

Pis′ton Blow′ing-ma-chine′.

Pis′ton-head.

Pis′ton-head valve.

Pis′ton-pack′ing.

Pis′ton–rod.

Pis′ton–rod Pack′ing.

Pis′ton–spring.

Pis′ton–valve.

Pitch–back wheel.

Pitch–cir′cle.

Pitched Fas-cine′.

Pitch′ing–piece.

Pitch′ing–tool.

Pitch–wheels.

Pit′man–box.

Pit′man–coup′ling.

Pit′man–head.

Pi-tot's′ tube.

Piv′ot-bridge.

Piv′ot-broach.

Piv′ot-drill.

Piv′ot-gear′ing.

Piv′ot-lathe.

Piv′ot-tooth.

Piv′ot-tran′som.

Pla-cen′ta-for′ceps.

Pla-cen′ta-hook.

Plain-com′pass.

Plain-mold′ing.

Plait′ed rope.

Plait′ing-at-tach′ment for Sew′ing-ma-chines′.

Plan-chette′.

Plane-ash′lar.

Plan′er-cen′ters.

Plane-sur′face.

Plane-ta′ble.

Plan-et-a′ri-um.

Plan′et-gear.

Plan′et-wheel.

Pla-nim′e-ter.

Plan′ing-ma-chine′.

Plan′ish-ing.

Plan′ish-ing-ham′mer.

Plan′ish-ing-roll′ers.

Plan′ish-ing-stake.

Plan′i-sphere.

Plank ′ing-clamp.

Plank ′ing-ma-chine′.

Plank ′ing-screw.

Plank-re-vet′ment.

Pla′no-con′cave lens.

Pla′no-con′vex lens.

Pla-nom′e-ter.

Plan-ta′tion-mill.

Plaq′uage-style.

Plas′ter-cast.

Plas′ter-ers' tools and work.

Plas′ter-ing-ma-chine′.

Plas′ter-mill.

Plas′ter-spat′u-la.

Plate-bend ′ing ma-chine′.

Plate-en-grav′ing.

Plate-hold′er.

Plate-i′ron Gird′er.

Plate-leath′er.

Plate-pa′per.

Plate-plan′ing ma-chine′.

Plate-pow′der.

Plate-print′ing ma-chine′.

Plate-rail′way.

Plate-roll′er.

Plate-warm′er.

Plat′form-board.

Plat′form-bridge.

Plat′form-car.

Plat′form-car′riage.

Plat′form-crane.

Plat′form-scale.

Plat′i-niz-ing.

Plat′i-num-steel.

Pla-tom′e-ter.

Plat′ ten -ing glass.

Plensh′ing-nail.

Plex-im′e-ter.

Plot′ting-scale.

Plow-clean′er.

Plug-cen′ter bit.

Plug′ging-for′ceps.

Plug-ma-chine′.

Plumb ′er-block.

Plumber's force-pump.

Plumb ′er's Sol′der.

Plumb ′ing and sheet-met′al work and tools.

Plumb-lev′el.

Plum ′mer-block.

Plum ′met-lev′el.

Plun′ger-buck′et.

Plun′ger-pole.

Plun′ger-pump.

Plun′ging-bat′ter-y.

Plun′ging-fire.

Plush-cop′per.

Pluvi-am′e-ter.

Pneu-mat′ic Bat′ter-y.

Pneu-mat′ic Cais′son.

Pneu-mat′ic car.

Pneu-mat′ic dis-patch′--tube.

Pneu-mat′ic drill.

Pneu-mat′ic El′e-va′tor.

Pneu-mat′ic Ham ′mer.

Pneu-mat′ic hoist.

Pneu-mat′ic Le′ver.

Pneu-mat′ic Par′a-dox.

Pneu-mat′ic pile.

Pneu-mat′ic pump.

Pneu-mat′ic Rail′way.

Pneu-mat′ic spring.

Pneu-mat′ic Tel′e-graph.

Pneu-mat′ic trough.

Pneu-mat′ic tube.

Pneu-mat′ic tube-valve.

Pneu-mat′ic valve.

Pneuma-tom′e-ter; Pneumo-nom′e-ter .

Pock′et-a-larm′.

Pock′et-book.

Pock′et-knife.

Point′ed arch.

Point′ing-ma-chine′.

Point′ing-rods.

Point′ing-wire.

Point-pa′per.

Po′lar Cir′cle.

Po′lar clock.

Po′lar Di′al.

Po-lar′i-scope.

Polar-is-tro-bom′e-ter.

Pole-car′riage.

Pole-futch′el.

Po-lem′o-scope.

Pole-pro-pel′ler.

Pol′ished brick.

Pol′ish-ing-block.

Pol′ish-ing-cask.

Pol′ish-ing-file.

Pol′ish-ing glass.

Pol′ish-ing-ham′mer.

Pol′ish-ing-i′ron.

Pol′ish-ing-ma-chine′.

Pol′ish-ing-ma-te′ri-als.

Pol′ish-ing-mill.

Pol′ish-ing Nee′dles.

Pol′ish-ing-pow′der.

Pol′ish-ing-slate.

Pol′ish-ing-snake.

Pol′ish-ing-tin.

Pol′ish-ing-wheel.

Pol′y-chrome.

Pol-ym′e-ter.

Poly-op′tron.

Poly-pan′to-graph.

Pol′y-pus-for′ceps.

Poly-zo′nal lens.

Pon′til; Pon′ty ; Pon′tee .

Pon-ton′--bridge.

Po′ny-chaise.

Po′ny-en′gine.

Poop-lan′tern.

Pop′pet-head.

Por′ce-lain-cem′ent.

Por′ce-lain-gild′ing.

Por′ce-lain-mill.

Por′ce-lain-ov′en.

Por′ce-lain-pa′per.

Por′ce-lain-pic′ture.

Por′ce-lain-print′ing.

Porch-post Sup-port′.

Porphy-ri-za′tion.

Port′a-ble boat.

Port′a-ble Boil′er and Fur′nace.

Port′a-ble Der′rick.

Port′a-ble fence.

Port′a-ble Fur′nace.

Port′a-ble press.

Port′a-ble pump.

Port′a-ble Rail′way.

Port′a-ble steam-en′gine.

Port′a-ble stove.

Port-cul′lis.

Porte-ai-guille′.

Porte-bou-gie′.

Porte-caus-tique.

Porte-cor′don.

Porte-cray′on.

Porte-mon-naie′.

Porte-pi-erre′.

Porte-pol′ish-er.

Port-fire Clip′per.

Port-fol′io-stand.

Port-hole Clos′er.

Port′land Cement.

Port-lan′yard.

Port-man′teau.

Port mouth-bit.

Port-pen′dant.

Port-rig′gle.

Port-tack′le.

Pos′ing-appa-ra′tus.

Po-si′tion-mi-crom′--e-ter.

Pos′i-tive eye-piece.

Pos′i-tive Mo′tion.

Pos′i-tive-mo′tion loom.

Post′age-stamp.

Post and stall.

Post-hole Bor′er.

Post-hole Dig′ger.

Post-mor′tem case.

Post-of′fice box. 1 .

Post-pull′er.

Post-tab′u-la.

Po′tance-file.

Po-tas′si-um.

Po-ta′to-as-sort′er.

Po-ta′to-bug Clean′er.

Po-ta′to-dig′ger.

Po-ta′to-hook.

Po-ta′to-mash′er.

Po-ta′to-plant′er.

Po-ta′to-scoop.

Po-ta′to-sepa-ra′tor.

Po-ta′to-wash′er.

Potch′er-en′gine.

Poti-cho-ma′ni-a.

Pot′ter's lathe.

Pot′ter's wheel.

Pot′ter-y and clay.

Pot′ter-y-gage.

Pot′ter-y-kiln.

Pot′ter-y-mold′ing.

Pot′ter-y-paint′ing.

Pot′ter-y-print′ing.

Pot′ter-y-tis′sue.

Pot′ting-cask.

Pou-de-soy; Pad′e-soy ; Pod′de-soy .

Poul′tice-boot.

Poul′try-feed′er.

Pounce-pa′per.

Pouncing-ma-chine′.

Pounding-ma-chine′.

Pow′der-blow′er.

Powder-ing-mill.

Pow′der-mix′er.

Pow′der-prover.

Pow′er-ham′mer.

Poz′zu-o-la′na.

Praying-ma-chine′.

Pre-pon′der-ance.

Preser-va′tion of food.

Pre-serv′a-to-ry.

Pre-serve′--jar.

Pre-serv′ing wood.

Presse-ar-ter′.

Press′er-fly′er.

Press′er-foot.

Presse-u-rethre′.

Press′ing-bag.

Press′ing-board.

Press′ing-plate.

Press′ing-roll′er.

Press-print′ing.

Press′ure-blow′er.

Press′ure-en′gine.

Pressure-fil′ter.

Press′ure-forg′ing.

Press′ure-frame.

Press′ure-gage.

Press-wheel Roll′er.

Prick′ing-wheel.

Prime-con-duct′or.

Prim ′ing-horn.

Prim ′ing-powder.

Prim ′ing-tube.

Prim ′ing-valve.

Prim ′ing-wire.

Prince Ru ′pert's Met′al.

Prince 's Met′al.

Prin′ci-pal Raft′er.

Print′ed Car′pet.

Print′er's Flow′er.

Print′er's gage.

Print′er's Roll′er.

Print′er's Var′nish.

Print-hold′er.

Print′ing-bod′y.

Print′ing for the blind.

Print′ing-frame.

Print′ing-ink.

Print′ing-ma-chine′.

Print′ing-pa′per.

Print′ing-press.

Print′ing-tel′e-graph.

Print′ing-type.

Print′ing-wheel.

Print′ing yarn.

Pris-cil′las.

Pris-mat′ic Com′pass.

Prism-mi-crom′e-ter.

Prism-sphe-rom′e-ter.

Proche-ame-ter.

Pro′file-cut′ter.

Pro′file-pa′per.

Pro′fil-ing-ma-chine′.

Pro-jec′tile.

Pro-jec′tion.

Pro-lap′sus-in′stru-ments.

Pro-me′the-an.

Prop′a-gating-box.

Prop′a-gating-glass.

Pro-pel′ler-en′gine.

Pro-pel′ler-pump.

Pro-pel′ler-wheel.

Pro-por′tion-al Com′pass-es.

Pro-por′tion-al or Prim′i-tive Ra′--di-i .

Prop′y-lae′um.

Pros′o-pom′e-ter.

Pro′te-an-stone.

Pro-tec′tive Pa′per.

Pro-tract′ing-bev′el.

Pro-tract′or.

Prov′ing-hutt.

Prov′ing-ma-chine′.

Prov′ing-press.

Prov′ing-pump.

Pro-vis′ion-car.

Prun′ing-chis′el.

Prun′ing-hook.

Prun′ing-knife.

Prun′ing-saw.

Prun′ing-shears.

Prun′ing-tools.

Pseudi-sod′o-mon.

Pseu′do-dipter-al.

Pseu′do-pe-rip′ter-al.

Pseu′do-scope.

Psy-chrom′e-ter.

Pter-yg′i-um.

Pud′ding-stone.

Pud′dled steel.

Pud′dle-rolls.

Pud′dling-fur′nace.

Pud′dling-ma-chine′.

Puff′er-pipe.

Pul′ley-block.

Pul′ley-check.

Pul′ley-clutch.

Pul′ley-drum.

Pul′ley-mor′tised.

Pul′ley-sheave.

Pul′ley-stand.

Pul′ley Sus-pen′--sion-hook.

Pul′ley-wheel.

Pull′ing-jack.

Pull′man-car.

Pulp-boil′er.

Pulp-di-gest′er.

Pulp-dress′er.

Pulp-grind′er.

Pulp′ing-ma-chine′.

Pulp-ma-chine′.

Pulp-strain′er.

Pulp-wash′er.

Pul-som′e-ter; pul-sim′e-ter .

Pul′ver-izer.

Pul′ver-izing.

Pum′ice-stone.

Pump′ing-en′gine.

Pump-ket′tle.

Pump-pis′ton.

Pump-scrap′er.

Punch′ing and Shear′ing ma-chine′.

Punch′ing-bear.

Punch′ing buhl-work.

Punch′ing-ma-chine′.

Punch-pli′ers.

Pu′pil, Arti-fi′cial.

Pup′pet-head.

Pup′pet-valve.

Pur′chase-block.

Purg′ing-cock.

Pur′lin-post.

Push′ing-jack.

Put′tock-shrouds.

Put′ty-knife.

Put′ty-pow′der.

Puz′zle-lock.

Puzzo-la′no; Puozzo-la′no .

Pyc′no-style.

Pyr-heli-om′e-ter.

Py-roph′o-rus.

Pyro-pho-tog′ra-phy.

Pyr′o-ster′e-o-type.

Pyro-tech′nics.

Pyro-tech′nic Bal-loon′.

Py-rox′--line.

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Pho-to-glyp′tic En-grav′ing.

A process invented by Mr. Fox Talbot, October 29, 1852, in which a design was so produced on metallic plates as to form a printing-surface.

A solution of gelatine, 1 part, water, 40 parts, is mixed with 4 parts of a saturated solution of bichromate of potash. The mixture is floated over a plate, giving an exceedingly thin film, and allowed to dry in the dark. Being exposed in connection with a print in a frame to sunlight, its surface is strewed with finely powdered copal, which is melted by the aid of heat. The plate is then etched by a solution of perchloride of platinum or perchloride of iron, which attacks only the parts unacted on by the light. When a sufficient depth is attained, the etching liquid and the ground are washed off, and the plate, after cleaning, is employed for printing. In place of the surface of copal he used, before exposure, fabric to cut up the flat tints by intercepting the light and enable them to hold the ink. The ingenuity of the process depends a good deal upon the selection of the solvent which dissolves the metal without effervescence, penetrating the unaltered gelatine and preventing its disturbance by the evolution of gas.

1877.

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