190 BULLETIN OF THE BUSSEY INSTITUTION. 
Piganks Mat- oo bas dare: Wil Nitrogen. —— of 
I. 44.76 ae 2.281 — 49.26 
it. 44.30 eatin 3.069 es 49.00 
Ill. 36.50 — 3.069 (sic) — 56.80 
Ill. A. 39.49 sincsae 4.97 — 77.14 
ILE: 34.99 , od 4.62 — 76.66 
TIT. CO. 33.33 — 4.50 pat No —— 
Ill. D. 38.18 — 4.58 — 17.52 
III. E. 35.59 — 5.31 ss 76.52 
Tire. 35.90 eats 9.16 peunsh oe, 
III. G. 38.40 rare 9.21 —_— 60.05 
‘ERB ISE 91.46 os trace aes Re 
LV 17.18 a 6.440 — 68.36 
vy 12.75 — 8.589 memset 68.25 
VI. 28.60 ome 3.390 oieaie 62.80 
VII. 3.09 — 0.311 some 96.13 
3.17 es 
VL. { 4 } 1.495 0.106 0.155 93.97 
0.80 — — — 98.20 
Tee { 2.20 — — — 94.70 
1<R. 6.27 —— — —_— 89,09 
0, 4.70 ae, ees — 88.59 
x. 5.02 0.203 0.048. — 93.88 * 
zu 3.21 0.205 ? ree 93.69 
XII. 1.00 — 0.229 — 98.50 
XIII. A. 0.95 — 1.15 about 0.389 96.07 
XIII. B. 6.42 0.35 2.53 — 86.75 
Kav; 1.50 saan i — 98.50 
XV. 3.88 mae 0.413 — 95.22 
XVI. eh 0.164 0.001 0.070 97.37 * 
2.04 
XVII. 4.44 0.530 0.055  —_—de 92.93 
XVIII. 1.49 = 0.250 —— 97.96 
min 1.00 ae 0.280 ote 98.39 
0 € 1.61 1.580 0.140 — 95.81 * 
a. & H — — — 0.052 ae 
I. Lobster-shell. Chevreul, cited in Schweigger’s “ Journal fiir Chemie und 
Physik,” 1821, 32. 495. 
II. Lobster-shell (/angouste). Fremy, “ Annales de Chimie et de Physique,” 
1855, 43. 94. Fremy states that the calcareous matter is deposited very irreg- 
ularly in the shells of crustaceans. He has found the proportion of inorganic 
matter vary from 37 to 47% in different parts of the shell of one and the same 
individual. 
See, further, Schmidt’s analysis of the ash of lobster-shell on page 179. 
- For an old analysis of lobster-shell by Merat-Guillot, see ‘“‘ Annales de Chimie,” 
34, 71. 
III. Shell of the crawfish (écrevisse). Fremy, ‘‘ Annales de Chimie et de Phy- 
sique,” 1855, 43. 94. 
III. A, B, C, D. Full-grown shells of crawfish (Astacus fluviatilis), respect- 
ively 8, 7,6, and 4.4 cm. long. Weiske, “ Die landwirthschaftliche Versuchs- 
Stationen,” 1877, 20. 45. 
III. E. Shells of crawfish, 5.5 c.m. long, that were not yet completely hard- 
ened. Weiske, as in III. A. 
* How’s figures refer to. “lime and carbonic acid.” 
