Intelligence and Miscellaneous Articles. 65 



present. The last is the process recommended to be used on a large 

 scale. The quantity of sugar fit for the market which can be ob- 

 tained from the sugar-cane by adopting bisulphite of lima, as above 

 recommended, is at least double that obtained by the usual pro- 

 cesses. 



In consequence of M. Melsens having made all his experiments on 

 the sugar-cane at Paris, and therefore on a small scale, he is not 

 able to state how bisulphite of lime can best be used in the large 

 colonial sugar manufactories, but is compelled to leave the application 

 of the principles on which his method depends to the intelligence of 

 the manufacturers themselves. 



In the preparation of beet-root sugar bisulphite of lime is quite as 

 useful as in the extraction of cane-sugar ; the way in which it is to 

 be employed in the former is fully explained in the second article 

 published in the 507th number of the Courier de V Europe, to which 

 we must refer those among our readers who desire any further in- 

 formation on the subject. — Gard. Chron., Dec. 15, 1849. 



MR. S. M. DRACH's THERMOMETRIC SCALE. 

 To the Editors of the Philosophical Magazine and Journal. 

 Gentlemen, 

 Having lately had occasion to advert to the superior practical 

 utility of Fahrenheit's thermometric scale, as not ordinarily requiring 

 decimal divisions and negative degrees like its congeners, it occurred 

 to me that a superior scale was feasible by dividing the distance from 

 — 40° Fahr. =— 40° Cent. =—32° Reaum. unto the boiling-point 

 -f212° Fahr. = -f 100° Cent. = -i-80° Reaum. into one thousand 

 degrees, placing zero at the former temperature. Thus one of my 

 degrees =0°-252 Fahr.=0°-140 Cent. =0°-112 Reaum.; and except 

 for some chemical purposes and extraordinary arctic temperatures 

 no negative degrees would be necessary. 

 If the zero were placed at 



—38° Fahr. = — 38°-8 Cent. = — 31°-1 Reaum., 



my degree =- Fahr. = — Cent. =- Reaum. 

 ^ ^ 4 72 9 



easier for marking off the point of melting ice in whole degrees. 



Some of the prominent points in these two scales are as follows : — 



o 



Mercury freezes — 39 F. = + 4-0 (1) or — 4 (2) 



Fahrenheit's zero + = 158-7 = + 152 



Ice melts -f 32 = 285-7 = 280 



"Water's max. density .... -f 39 = 3135 = 308 



Medium temp. 10° C + 50 = 357-1 = 352 



Equatorial temp + 84 = 492-1 = 488 



Blood heat -f 98 = 547-6 = 544 



Greatest heat felt, say. . . . -|- 150 = 754-0 = 752 



Alcohol boils -^ 174 = 8492 = 848 



Water boils -f212 = 1000-0 = 1000 



, , , ... r-f655 = 2758-0 = 2772 



Mercury boils | ^ g^^ = 2825-4 = 2840 



PhiL Mas. S. 3. Vol. 36. No. 240. Jan. 1 850. F 



