1803.] 
Literary and Philofophical Intelligences 
j 
965. 
trials made with twelve famples of good different folutions of fubftances moft eafily 
wheat A. and twelve famples of very to be procured. 
‘{mutty wheat B. each fort fteeped in twelve 
Specific!Buthels} Number of Buthelsof good 
Solutions in which the Wheat\Gravity; fown jSmutty Ears in|WheatperAcre|Cwt. of Straw 
was fteeped 24 Hours |ofSteep} per 
Acre. 
February 27, 1802. 
1. Solu. of potafh .....- 1.307 bo eOL 
2. —— muriate of potafh | 1.097 | 3.51 
5, ——- nitrate of potath 1.080] 3.51 
eS (7 a 1:056').. 3.51 
5. —— wuriate of foda 1.089 | 3.51 
6. —— lfulphate of foda | 1.047 | 3.51 
7. muriate of ammonia] 1026.) 3.51 
8. ——— common foot .. 1.095 4.13,51 
9, —— lime faturated 1.003} 3.54 
10..—-— nitric acid .... 1.016 | 351 
11. ——— muriatic acid .- 1.0044 S.b1 
412. —— fulphuric acid 1,050} 3.51 
13. Dry inits natural fate |... .| 3.51 
14. Wathed in commonwater| .... | 3.51 
three Sheaves | of Produce per Acre. 
A. B. A. B. as a Ce 83 
1 81 21.6} 13.6] 36.6} 29.1 
3 218 20.2} 10.1) 36.0: 21.4 
@ 4 dd 23.8 | 14.5} 36.9}. 34.9 
9 159 20.2) 41.71 35.6.) 26.7 
0 290 24.0} 14.5) 41.51 33,3} 
12: | 241 21.6} 12.3} 38.5.| 97.81. 
1 150 19.3'4°.47.6 | 35.44. 30.2 
0 123 20.8. |°.11.4) 34.8 | 25.3 
0 2 21.9} 412.4) 38.7 | 25.9% 
RODE, | SREW) | 4) Sete Pm eae ho aim) BUNT 
04,136. |. 20.75) apc aa-7 1) 34.4), 
0 0 20.4 | 17.8) 55.4% 37.4 
6 323 20.3.4 14.7 |, 35.7 | 31.0 
hone town) 107 aaah D660) | ee ae 
_A new method of preparing fulphate of 
foda from fulphate of lime, confifts in 
making into a paite with a fufficient quan- 
tity of water, eight parts of burned gyp- 
fum, or fulphate of lime, five of clay, 
and five of common falt. 
is burned in a kiln, and then ground to 
powder, diffufed ina fufficient quantity 
of water, which, after being ftrained and 
evaporated, is fuffered to crytiallize. 
Many of ‘the Cornwal] tin-mines are at 
prefent exhaufted, and others are worked 
to little advantage. Polgooth, the great- 
eft tin-mine in the world, though it pro- 
duces large quantities of ore, is, how- 
ever, attended with fo great an expence, 
in confequence of its depth, that.it yields 
but {mal] profits to its proprietors: Se- 
veral mines near the Land’s End, which, 
for fome years, produced but little ore, 
are now working to more account. The 
copper-mines are alfo in general falling 
off, and fome are relinquifhed. in conle- 
quence of their depth. Dolwath has, 
however, at an enormous expence been 
brought into work, and yields an abun- 
dance of indifferent metal. 
The following is given by Mr. Speechly 
as the beft method of making a rich com- 
pot of pond-mud. “ The firft courfe or 
toundation of the intended heap may be 
made of common mould about twelve 
inches thick ; upon this lay a courfe of 
dung, freth from the ftable, fourteen or 
fifteen inches thick ; next put a layer of 
pend-mud nine inches in thicknefs, upon 
which lay a courfe of lime frefh from the 
Montuiy Mas, No, 106, 
This mixture. 
kiln, five or fix inches thick and fo alternates 
ly alayer of dung and lime between every 
two layers of pond-mud, till the whole is. 
finifhéd. |The dung and lime will occa- 
fion a gentle fermentation throughout 
the whole mafs. When the heap has Jain 
three or four months, it fhoutd be turned, 
after which it will ioon be ready to lay on 
the land. 
The maxim laid down by Buffon, 
‘¢that no fpecies of animal in the torrid’ 
zone had been primitively placed in both 
Continents,’’ was lately fuppofed to have 
failed in the cafe of the crocodile, which 
by fome officers of the French ftaff was 
faid to be of the fame f{pecies at St. 
Domingo, and in the Nile. To afcer- 
tain the faét M. Geoffroy has compared 
the crocodile of St. Domingo, fent home 
by M. Le Clerc, with one which he him- 
felf brought from Egypt, and he obferves 
that, 
‘¢Thecrocodile of St.Domingorefembles that 
of the Nile, in regard to all thofe charatters 
which ferve to diftinguish the latter from the 
caiman 3 it, however, has the jaws narrower 
and longer 3 the breadth of them is to the 
length as three to fix. In the crocodile of 
the Nile the ratio is that of four to fix. The 
body of the crocodile of Saint Domingo is 
alfo proportionably longer, and the tail con- 
fits of three bands morg, twenty in one, and 
feventeenin the other. The firft two of the 
lower teeth are fo long that they pierce the 
upper jaw from one fide tothe other; whereas 
they are fmailer in that of the Nile, and 
form for themfelves only two {mall cavities 
in which they are received. he fourth 
M tooth 
