458 



CATALOGUE. — METEOROLOGY, HYGROMETERS. 



nute, correspon^^ng to vaponr deposited at 2 1 .5 : it was ac- 

 tually at 22°. Gilbert says, that Schmidt's experiments 

 agree perfectly with Dalton's theory. Gilb. XV. 25- 

 Lambert's experiments, reduced to English measure, give 

 5.95,5.53, 3.51, 1.53, asd .77, at 169°, 167°, 142°, m". 

 and 84° ; instead of 11.83, 11.25, 6.19, 2.68, and 1.14; 

 which are nearly in the same proportion, although almost 

 twice as great. 



Hygrometers. 



A hygrometer of transverse deal, turning a 



wheel. Ph. tr. 1676. XI. 647i 

 Conier's hygroscopes. Ph.tr. 1670'. XL 715. 



Both of deal. 

 '"Gould on oil of vitriol used as a hygroscope. 



Ph. tr. 1684. XIV. 496. 



■ Also on a hygroscope of lute string. 



Molyneux on a hygroscope. Ph. tr. 1685. 

 XV. 1032. 



Of whipcord. 



Amontons's hygrometer. A. P. II. 13. 

 Lahire on the abbreviation of moist ropes. A. 



P. IX. 157. 

 Leupold. Th. Aerostat. 1. 13. . 17. 

 Arderon's hygroscope. Ph.tr. 1746. XLIV. 



95. 



A sponge counterpoised. 

 Arderon on the weathercord. Ph. tr. 1746. 



XLIV. 169. 



A whipcord a little inflected, drawing transversely as it 

 straightens itself. 



Arderon's hygrometer. Ph. tr. 1646. XLIV. 

 184. 



Of cross grained deal, acting on levers. 

 Ferguson's hygrometer. Ph. tr. 1764. 259. 



A transverse slip of white deal, with cords and pullies : 

 it requires to be changed every four years. 

 Lambert's essay on hygrometry. A. Berl. 

 1769. 68. 1772. 65. 



With diagrams. 



Smeaton's hygrometer. Ph. tr. 1771, 198. 



A cord impregnated with salt. 



Deluc's hygrometer. Ph.tr. 1773,404. 

 A tube of ivoiy filled with mercury. 



Deluc Idees sur la m^teorologie. I. 



Deluc on the hygrometer. Roz. XXX. 437. 



XXXII. J 32. 

 *Deluc on hygrometry. Ph. tr. 1791. 1. 389. 



A transverse slip of whalebone, held by pincers, attached 

 at one end to a thin flattened wire of silver gilt, of which 

 the other end is fixed to a weak spring. 



Lowitz's hygrometer. Gott. Mag. III. 491, 

 Senebieron his hygrometer. Roz. XI. 421. 

 Inochodzow's hygrometer, A. Petr. II. ii. 

 193. 



A schistus which is weighed. 



Copineau on the hygrometer. Roz. XV. 



384. 

 *Saussure Essai sur I'hygronietrie. 8. Neuch, 



1783. R. I. 

 Saussure's defence of the hair hygrometer, 



Roz. XXXII. 24, 98. 



Says, that Deluc's hygrometer is irregular : objects to 

 Chiminello's quill with mercury, and to Jean Baptiste's 

 ribband. 



Schreber on the oculus mundi. Naturforsch. 



xix. Halle, 1783. 

 Gedda sur les hygromStres. Copenh. 1784. 

 Cazalet on Casbois's hygrometer of the silk 



worm's intestine, Roz. XXIX, 344, 



Seems to have little advantage. 



Achard. A, Berl. 1786. 3, 



Denies that hygrometers indicate the true quantity of va- 

 pour not precipitated. 



Franklin on a hygrometer of mahogany. 

 Am. tr. II. 51. 



Kriinitz Encyclopadie, XXVII, 



Sir B. Thompson on the moisture absorbed by 

 various substances. Ph.tr. 1787.240. Re- 

 pert. IV. 247. 



The weight of wool was increased from 1 to 1.084 in 4« 

 hours, in 72 to 1.IS3, the thermometer being at 45°, and 

 the air saturated with moisture : of other substances exa- 

 mined, the most absorbent was fur, then eider down, silk 

 linen, and cotton : the cotton was increased to 1 .043 and 

 1.089. Hence woollen clothes next the skin are recom- 

 mended. Silver wire acquires no additional weight. 

 Ricke's hygrometer, Gren, I, i. 150, 

 Pilgrams wetterkunde. 



