INDEX.
831
Plymouth Breakwater— Model of, 208, 080, 09G.
Plymptos (Devon).— Porcelain clay obtained from a depositnear Plympton, 11, 12.
Pneumatic Battery —For igniting gunpowder in blastingoperations, 206.
Pneumatic Governor. —Patent pneumatic governor forregulating the speed of steam-engines, 173.
Pocket Books. —This branch of trade very limited till IS2S,449. Improvements effected in that year by Messrs.J)c la Kuo, and great stimulus imparted to the manu-facture, ib. Considerable export trade in these articles.tb. Solidity of English workmanship, ib. Number ofhands employed in the manufacture in the UnitedKingdom , ib. Specimens exhibited, 449, 450. Awardsto exhibitors, 453, 454.
Pocket Communicator —Description of, by means of theelectric telegraph, 289. Object for which designed, ib.
Pocock and Rawlings, 35*3.
Poidebard, N., 162, 364.
Poillen Brothers, 556.
Poilly, De, and Co., 536.
Poinsignon, —, 600.
Point Lace. —See Lace.
Poirier, L., 506.
Poirier, P., 480.
Poisart (Uncle), and Co., 629.
Polak, F.,471.
Polakiscotes —Biot’s apparatus for the polarization ofliquids, 315. Reflecting and oxyhydrogon polariscopes,ib.
Poliakoff and Zamiatin, 3G6.
Polishing Stones. —See Hones.
Poliak, A. M., 635.
Pollock, J., 394.
Polycarpo, A., 346, 491.
Pomegranates. —Samples of dried, said to be used fordyeing yellow, 91.
Pommcrceul Smelting Company (Belgium), 22.
Poncelct, A. (Juror), xxvi.
Poncelet , General J. V. (Juror), xxv, xxvi, 190.
Ponchos. —Specimens of this fabric, 356, 358,
Pond and Co., 509.
Ponomareff, Madame, 33, 34.
Ponson, C., 366.
Pontifex, G., 103, 140.
Pontifex and "Wood, 48, 203.
Pouting, T. C., 48.
Pook, S. M., 217.
Poole, Messrs., 336.
Poole, S. Ii., 52.
Pooley, II., and Son, 191.
1*00 loo’s Chinese Cement —Sample of, 47.
Poore, J. B., cxx.
Poortman and Yisser, 48.
Pope, J., 95.
Pope and Plante. 479.
Pope and Son, 173, 509.
Popclin-Pucarre, 70.
Popinoff, Sophia, 472, 480.
Poulins —Specimens of, 375, 376.
Popoff, A., 163.
Poppleton, K., 360.
Poppy Cake— Specimen of, from the East Indies, 55, 56.
Porcelain. —Materials employed in Porcelain manufactureat the great works of Kiaing Tiht’Chin, in China, 23.Nature of the specimens exhibited, ib. White porcelainware from Limoges, 23. Kaolins and pegmatites usedin the preparation, ib. Superiority of the porcelaindue to the purity of the clay, ib. New patented appli-cation of coloured and moulded porcelain for archi-tectural decoration, especially adapted for door-casesand arches, 587, Invention of a vitreous marble pastein a kind of porcelain, ib. Remarks on the high cha-racter of the works in biscuit or porcelain, exhibitedby Messrs. Minton, Copeland, and others, as works ofart, 694.—See also Ceramic Manufactures. Clay, Pot-tery, §’c. Mosaics.
Porcelain for Chemical Purposes. —Manufacture thereoflately established by Messrs. Minton, 540. The labo-ratory hitherto dependent upon foreign manufactories,ib. Articles of semi-porcelain for chemical purposesby Grainger and Co., 541. Products of the Royal SaxonChina Manufactory referred to, 543.
Porcelain Glazes— Use of boracic acid in the preparationof, 3S. Vessels made with the salt-glaze ware used inthe manufacture of sulphuric acid, ib.
Porcelain for Picture Painting —Specimen of, 542.
Porcupine Quills. —Examples of articles of clothing andfurniture, ornamented with the quills obtained from theNorth American porcupine, 600.
Porpii v uy and Works therein. —Remarkable beauty ofpolish of a collection of porphyry slabs from Cornwall ,8. Moderate price of these slabs, from the mechanicalcontrivances used in polishing, ib. Specimen of por-phyry, described as I'.Ivan stone, from the New Quayquarries (Cornwall ), 13. Great variety of porphyriesin the Vosges, 27. Slabs and pedestals of Cornish por-phyry exhibited, 565. Few examples of foreign por-phyries in the Exhibition ; objects exhibited, 565 , 566.Works in Swedish porphyry, 565.—See also Granites.
Port Adelaide.— Pre-eminence of Port Adelaide for wheatand barley, 52.
Port Phillip —Samples of good wheat from, 52.
Portelli, A., 520.
Porter, W. II., 564.
Portfolios —Number of manufacturers contributing, 449.High degree of perfection in the manufactures ofGermany, ib. Offenbach the principal scat of manu-facture, ib. Improvement effected by De la Rue andCo., ib. Variety of specimens exhibited, ib. Awardsto exhibitors, 453.
Portland Cement . —Numerous objects inPortland cementexhibited; prizes awarded, 573, 574.—See also CementsHoman , §*c.
Portmanteaus. —Porfmanteaus of very ingenious and clevercontrivance exhibited, 394.— See also Leather , Sec.
Portugal.— Large number of specimens of marbles fromPortugal , 33. Two excellent series thereof exhibited,ib. Lithographic stones of even grain, and very com-pact, ib. Specimens of lead ore ami manufactured lead,ib. Ccrcalia illustrating the agricultural resources ofPortugal , 52. All of fair but none of particular merit,ib. Sample of Carolina rice from Portugal , 53. Sam-ples of beans, peas, &c., 54. Samples of flour, 55.Olives and olive oil, 57. Valuable series of coffeesfrom various of the colonics of Portugal , 59. Mustardseed, 62. Samples of capers, ib. Fine sample of copalfrom Angola. 76. Samples of starch from Estramaduraand Kvora, 79. Large number and excellent specimensof oils, 84. Important collection of dye stuffs, 90.Good samples of sumach, 93. Samples of cotton, 96.Specimens of flax aud hemp, 99. Samples of vegetablefibres, 103. Specimen of Portuguese cork, ib. Com-paratively small number of Portuguese woods contri-buted, 153. Specimens of fine white wax, 163. Sam-ples of glues, 166. Specimens of animal charcoal, inpowder, ib.
Surgical instruments, 346. Cotton manufactures, 348.Variety of woollen cloths, 352. Primitive characterthereof, ib. General remarks on the silk manufacturesof Portugal , 363. Specimens of mixed fabrics, 374.Good copies of French and English fabrics, ib. Fairpromise of excellence, ib. Objects exhibited, ib. Ob-servations on the sealing-wax manufacture of thiscountry, 451. Specimens exhibited, ib. Observationson the printed goods, 458. Specimens of carpets, 475.Cutlery, 491. Articles of jewellery, 520.
Glass wares, 536. Earthenware, 542. Interesting seriesof Portuguese marbles of great variety and beauty, 561.Interesting specimen of mosaic, 569. Fine specimensof terra cotta jars, 584. Specimens of refractory bricks,585. Specimens of coopers’ work, 602. Creditablecollection of soaps, 611. Remarks on the quality andarrangement of conserved fruits from Portugal , 639.Specimens exhibited, 641. Remarks oil the contribu-tions of cambric flowers and wax fruits, 643. Sj>cci-mens exhibited, 644, 645. Inlaid ebony writing-case,654. Parasols and umbrellas, 659.
Portugal , His Majesty the King of, 654.
Porzeit and Harperath, 563.
Potash, Acetate of.— Price thereof in Germany , 49.
Potash, Bicarbonate of— Samples of, 46.
Potash. Bichromate of. —Great advantage to which thispreparation was exhibited, 39. Process adopted priorto 1820; price at which then sold, ib. Improvementseffected in the manufacture described, ib. Names of theearliest great manufacturers, ib. Circumstances whichfirst increased the demand and stimulated the improve-ment of the manufacture, ib. Its use in dyeing wool,ib. Statement of the amount manufactured by onemaker in Scotland from 1825 to 1850, with the priceper pound, ib. Samples of bichromate of potash, 45,47, 50.