INDEX.
781
Puchel and Son, 475.
Duchenc, J. J., 239, 242.
Duck, Dkabuf.ts, &c.— General excellence of the specimensexhibited, 371, 372,373.
Ducluzcau, Madame A., 6S7, 702.
Ducourtioux, C. L., 596.
Ducroquet, P. A., 324, 325, 333.
Ducrot and Petit, 669.
Dudgeon, Messrs., 95.
Dudman, J., 448.
Dufaville, —, 165.
Duffield, C., 65.
Dufour, A. (Juror), xxviii.
Dufour, J. B.. 577.
Dufour, L., 45, 454.
Dufossce, —, sen., 479.
Dufossee and Melnotte, 479.
Dufrenoy, A. (Juror), xxvi.
Dugard, N. and 11., 504.
Duggin, T. B. , 76, 92, 103, 140, 664, 671.
Duhaijon, B., 748.
Duhayon-Brunfaut and Co., 468, 471.
Duirech, —, 558.
Duke and Son, 677.
Duley, J., 504.
Diiltgen Brothers, 508.
Dulud, J. M., 550, 551.
Dumaine, J. A.. 193.
Pumaine, X., 162, 364
Dumas, J. (Juror), xxv, xxvi, 624.
Pumbleton, 11., 140.
Dumerey, Messrs., 201.
Pumeril, Sons, and Co., 672, 673.
Dumon, ~, 700.
Pumorticr and Co., 628.
Pumortier, L., 99, 370.
Dumpy Level. — The index bar being placed verticallyinstead of horizontally, 254. Change in the inode ofadjusting the bubble, ib.
Duncan, Flockhart, and Co., 45.
Puncan, Judge E. S. (Juror), xxvi.
Puncan, L. C. (Juror), xxx.
Puncan, W. L., 45.
Punliill, T., 689, 696.
Punin, Count, 311, 312.
Dunn, A., 607.
Dunn, 1., 187Dunn, W., 600.
Punzberg Salt Works (Prussia), 32.
Pupierry,—, jun., 23.
Pupin, J3aron C. (Juror), xxv, xxvii.
Dupont , and Co., Messrs., 452, 696.
Puport, V., 390.
Puppa, B. E., 688, 694.
Duprat and Co., 103, 601.
Dupre, W. II., 508.
Dupre de St. Maur, 90, 95.
Dupuis, J., 562.
Durand, E. P., 550.
Durand, F.. 518.
Puranton, J. B., 348.
Purer, Albert, 400, 403.
Puret, —, 700.
Durham.— Documents on the geology of the coal districtsof Durham , 10. See also Lead.
Durham , J. B. (Juror), xxix, xxxii. (Exhibitor), 4S6, 516.Duseigneur, —, 161.
Dussol, —, 162.
Dutertre, A., 517.
Duval, A., 161.
Duval, Amory, 732.
Duvelleroy, P., 668, 669.
Duverger, —, 408.
Duzoglou, —, 452.
Dyas, E , 413.
Dyce, AY. (Juror), xxix.
Dyer, —, 196, 315.
Dyes and Colours.— Samples of dyeing materials, 47, 50.New black dyeing material for silk, 47. Extracts ofdve-woods, ib. Considerable modification which thearts of dyeing and printing in colours have undergoneduring the last half century, 85. No manufacturingprocesses have received more important assistancefrom the labours of chemists, ib. Dyeing purely -
chemical operation, 85. Vast number of new colouringmaterials discovered and rendered available, ib. Im-proved modes of applying those already in use, ib.Increased use of many vegetable colours, ib. Demandspringing up for various dyeing stuffs, ib. Greaterpart of the vegetable dye stuffs used in Great Britain derived from foreign countries, ib. Table showing thequantity of some of the chief dye stuffs imported in theyears 1848, 1849, and 1850, ib. Statement of the pro-portion in which some of the principal dye stuffs aresupplied by different countries, ib. Series of dye stuffsincluded in the collection of Liverpool imports, 86.Samples of dye stuffs included in the series of Hullimports, ib. Complete illustration of the operations ofthe dyer and calico printer, ib. Specimens exhibitingthe various stages of dyeing and printing, ib. The artsof dyeing and printing, although involving differentprocesses of manipulation essentially the same, ib.Detail of the process of dj-eing, ib. Also of calicoprinting, ib. Nature and use of mordants in the pro-cess of dyeing, ib. Complete collection of the variouschemical agents employed by the dyer, 87. Enumera-tion of the more important of these substances, ib. Ob-servations on, ami descriptions of, the various colouringmatters or dye stuff's exhibited, 87, 88. Mixture oftints effected by the combination of several substances,88. Samples of skein silk by London dyers, ib. Seriesof dyes in fast colours on Lisle thread for glove making,ib. Dyed lace cotton resembling the liard-thrownmarabout silk, ib. Extensively used in the manufactureof velvet, gauze, ribbons, and other fabrics, ib. Valu-able collection illustrating the native vegetable dyes ofScotland , ib. Highly complete and instructive scriesof lichen preparations, ib. Specimens of safflower, andgood illustrations of its use in dyeing silk, ib. Goodspecimens of dye stuffs, including an interesting seriesof lac dye, ib. Sample of chicory woad, ib. Can beused as a blue dye in the place of real woad, ib. Price| of chicory woad and of real woad, ib. Large and highly-
valuable collection of dye stuffs from India , 83-90.Little or nothing known of many of these dyes, 90.Several evidently rich in colour, ib. Most of them maybe easily had in large quantities, and at comparativelylow prices, ib. Samples of various dyes from Ceylon,■ib. Samples of lichen, or orchilla weed, from the Cape of Good Hope , ib. Specimens of the various descrip-tions of dye stuffs from British Guiana, ib. Trinidad,ib. Falkland Islands , ib. Australia , ib. Van Diemen'sLand and New Zealand , ib. Austria , ib. China , ib.Egypt , ib. France , ib. Algeria , 91. Greece , ib.States of the Zollverein , ib . Portugal and Madeira,ib. Russia , 90, 91. Spain , 91. Tunis , ib. Turkey ,ib. Tuscany , ib. —See also Garancine. bladder.Wood, §*c.
Dyed Goods. —See Wool-dyeing. Woven , Spun , §r., Fabrics.
Dynamoguapii.— A dynaraograph from Austria , exhibitedby the Chevalier de Burg, 169.
Dynamometers. —The invention of these machines, fordetermining the most favourable conditions for theconstruction and working of machines, with respect tothe economy of power, is due to General Poncelet , 190.Explanation generally of the application of these ma-chines, ib. Dynamometers exhibited constructed under| the direction of Colonel Morin, ISO, 191. Specimen of aj cultivator-dynamometer, exhibited by E. 11. Batall. 242.
Remarks on the various dynamometers exhibited, 304.
; Eades and Son, 199.
i “ Eagle Slayer,” The (sculpture)—Remarks thereon, 685,
I 692,706.
Earnshaw, II., 394.
; Early, E., 359.
Early, J., and Co., 359.
! Earle, T. K., and Co., 204.
Earrings. —Specimens of turquoise earrings from Russia most perfectly set, 517.
Eastern Archipelago— Excellent specimens of gums andresins from, 76. Ratans and bamboos frem, 664.
Earthenware. —See Ceramic Manufactures.
Easson, A., 372.
East and Son, 392.
East India. —Specimen of minerals and rocks belonging tothe crystalline formations of India , 14. "Wheat, fromtime immemorial, a staple crop in the plains of Northern India , 52. Oats also extensively cultivated, ib. Generalshortness of the crops, owing to defects and carelessnessin agriculture, ib. Causes of the wheat reaching Eng-