216 Ondifferent Sorts of Lime ufed in Agriculture. 
incorrect, as, in two fpecimens which differed moft in the 
proportion of magnefia and lime, the weight of the two 
earths was nearly the fame. 
A picce of dolomite, from Rome, was wrapped in a thin 
leaf of platina, that no part of it might be loft, and, being 
then expofed to a ftrone heat, left of carth - 52.9 percent, 
~ Dolomite from Mount Vefuvius - Agee 
Breedon limcftone - ~ 52-4 
Calcareous fpar left of Jime - - 55:8 
Tn three of the experiments, alfo, the calcareous earth was 
precipitated by mineral alkali; and the quantity of it being 
tried by that of the marine acid required to diffolve it, it 
correfponded very nearly with that put down. 
A quantity of marie acid which would diffolve 15 grains 
of calcareous fpar, would alfo diffelve 5.5 of calcined mag- 
nefia, and 2.5 grains.of {par; fo that 12.5 grains of {par, re- 
‘quired the fame quantity of acid as 5.5 grains of magnefia. 
The magnefia ufed was yery pure, and made red-hot im~ 
mediately before it was weighed. 
VE eee EEN Be SCE NTR ND VRS Ae Ta Boh 2 Ee 
Quantity: of 
: ‘ thd acidy 
Subjlances examined. foie cup tae Quantity of Quantity of | Iron 
magnefia, magnetia. Jime. and 
would have clays 
diffolved. 
ist BES Iw oe Thea SEWN AS ~7_—_—_ 
Mixture of 5.5 grains of mag- 
nefia and 14 grains of calca- 
reous {pare = =} T20§ 5.5 4.8: ° 
25 grains of Brsedon Haetoae, 
TH ian of powdered = -] 11.53 5-071 7929 2 
5 grains from part of the fame 
powder - = - | 11.56 5.082 9-913 2 
25 grains of dolomite from 
Rome - - - | 12.2 $37 7.73 ms 
—— dolomite from sale 
Iona - - - - | 10.1 4.4 78 I of im 
—- Vefuvian dolo- 2 ftauce. 
mite - - - = | 10.38) | 4565 | 8.575 | sc6 
A fecond experiment, from Ms 
pam of the fame Vefuvian 2 
dolomite - - - | 1003 | 4411 8.849 | -cb 
25 grains of magnefian lime- : 
ftone from Wanfworth, near 
Doncafter —__ - - | 32.75 5.61 7634 +25 
—_—— Thorpe arch - f 1095 4.84 7.8 6 
—— Matlock - =] 12.5 La 7-388 | +3 ° 
York-minfter - | 11. - | 4-84 8.26 .r 
os Woikfop - -} 11.6 5.104. 7.496 | 6 
————-——- Sherburn - - | 11-5 5.08 7-56 56 
—————— Weftminfter-hall} 10.1 4-44, {1-837 av 
Il, Agenda, 
