297 
Absorption, 
lie roads, which my professional experience, or the books which I 
possess, or to which I can gain access may furnish and transmit 
it to you. Much is also to be said on the subject of wheel car- 
riages, and the hint you have thrown out respecting the employ- 
men! of small carriages in greater number, instead of heavy wag- 
gons, is well worthy of investigation. 
B. H. LATROBE. 
Pittsburgh Feb. 10, 1814. 
I need hardly say, that I shall be greatly obliged by Mr. La= 
trobe’s future communications on this important subject, so little 
understood upon principle, in the United States. My own col- 
lections on the subject of roads and one horse carts in particular, I 
will endeavour to introduce (if I can) in the next number : per- 
suaded that though this be not a popular subject, it is a subject of 
■ great moment T. C* 
ABSORPTION OF DELIQUESCENT SALTS. 
Table of Efflorescent and Deliquescent Salts. By M. Cadet* 
26 Till. Mag . 242. 
Efflorescent Salts. 288 grains. 
Sulph. Soda in 
61 days 
lost 
of water 
203 grains. 
Phosph. Soda 
39 
- 
91 
Carbon. Soda 
51 
- 
86 
Deliquescent Salts 
288 
grains absorbed 
Nitrat Soda 
137 days 
- 
- 
257 grains. 
Lime 
147 
- 
*■ 
448 
Magnesia 
73 
» 
- 
207 
Alumine 
147 
- 
* 
300 
Copper 
128 
* 
- 
397 
Zinc 
124 
- 
- 
495 
Antimony 
124 
- 
- 
388 
Manganese 
89 
- 
527 
Muriat Lime 
124 
- 
- 
684 
Magnesia 
139 
* 
A eb 
44 1 
Alumine 
149 
* 
‘ 
342 
Copper 
119 
* 
- 
148 
Zinc 
76 
- 
* 
294 
Vot. in. v P 
