14
CHEMISTRY.
£ S. d.
Dr. Wollaston’s neat working apparatus, explaining
the principle of the condensing engine . .076
A small working model of a high pressure steam en-
gine, in brass
.
. 25
0
0
Ditto, on Trevethick’s principle
. 20
0
0
A ditto condensing engine
.
. 30
0
0
Larger ditto, complete, Bolton’s
3 and Watt’s, £60
to 70
0
0
Working model of a locomotive
engine
. 25
0
0
Models, in wood and brass,
of all descriptions
of
steam engines, pumps, machinery, &c. made
to order .......
Large dissected ditto, shewing the interior actions, intended as models of illustration for lectures, &c.
Ditto, on a small scale, for private instruction .
Dr. Henry’s boiler, for experiments on steam, complete 2 10 0
Dr. Marcet’s high pressure steam apparatus, exhibiting the increase of temperature and pressure . 3 10 0
Dr. Wollaston’s cryophorus . . . . .046
Ditto, mounted with brass plate, for the air pump . 0 18 0
Spirit lamp, mounted with platinum wire, forming the
lamp without flame . . . . .060
Apparatus, for the decomposition of water, by the
passage of steam over red hot iron, £1 10s. to 2 10 0
Gun barrel and retort apparatus, for potassium and
sodium, upon the most approved plan . .115 0
Aikalimeters, for ascertaining the quantity of real alkali, present in any sample of potash, barilla,
&c. . . . . . . 6s. to 0 10 0
Lactometers, for shewing the quantity of cream produced from milk, single or in sets, Is. 8d. to 0 12 0
Stands, for ditto .... 2s. 6d. to 010 0
Pepy’s compound apparatus, for freezing mercury, &c. 2 10 0
Dr. Prout’s apparatus, for the analysis of animal and
vegetable bodies . . . . . .400
Cooper’s ditto, for the same . . . . .14 0