24
METEOROLOGY.
£
Newman’s portable mountain barometer, with brass legs to draw out, and scale connected to the cistern, in leather sling case, with printed instructions 8
Wollaston’s thermometrical barometer, for measuring
heights ....... 5
Sir H. Englefield’s mountain barometer . £3 10s. to 4 Syphon barometer, with moveable scale, for accurately observing the height of the column of mercury, from the two surfaces . . £5 5s. to 10
Marine barometer, on springs . . . £5 to 7
Plain barometers . . . . £l 10s. to 4
Ditto, with thermometer . • . £2 10s. to 5
Wheel barometer . . . . £2 10s. to 6
Standard thermometers, made with extreme care, the
degrees divided into fifths . . . .2
Thermometers, in elegant mahogany frames, £l 5s. to 2 Ivory thermometers, on black stands, with glass covers
. 7s. 6d. to 0
Ditto, very neat, on ivory carved stands . 12s. to 1
Ivory and metal scale thermometers, in red cases, with the scales divided according to Fahrenheit, Reaumur, and centrigrade . . 10s. to 1
Pocket thermometer, in red cases . . 10s. to 0
Ditto, in ivory tooth pick cases . . £1 to 1
Ditto, ditto, with compass on the top . £l 4s. to 2 Self registering thermometer . . . 12 s. to 1
Ditto, with brass joints and covers . . 18s. to 2
Ivory thermometer, in glass tube, fixed on mahogany
frame, with copper roof for outside windows , 1
Six’s improved register thermometers, £ l 11s. 6d. to 2 Thermometer, fixed in the focus of a mirror, on stand,
for ascertaining the direct effect of radiant heat 2 Mercurial thermometer, with scale jointed, to 600
Fahrenheit ....... 1
Spirit ditto, to 150° below zero . ... 0
s. d.
8 0
15 6 10 0
10 0 7 0 10 0
5 0
6 0
0 0 10 0
18 0 10 0
5 0 18 0 10 0 15 0 10 0 18 0
10 0 2 0
10 0
0 0 18 0