Receiving Pots for ditto, extra 2s. and 3s. 6d.
113 =Rain Gauge=, having a receiving surface of 12 inches diameter, and graduated glass gauge tube, divided to hundredths of an inch, in japanned metal, with brass tap 2 10 0
Ditto ditto, with sliding rod instead of graduated tube, japanned tin 2 2 0
=Rain Gauges=, of any form or area made to order, with suitable measuring glasses.
125 =Robinson's Anemometer=, Fig. 87 3 3 0
Ditto ditto, Improved arrangement £4 10s. 5 15 0
Ditto ditto, with clutch movement, Fig. 88 6 15 0
=Negretti and Zambra's Improved Air Meter=, of extreme sensitiveness, very portable 4 4 0
127 =Osler's Self-Registering Anemometer and Rain Gauge=, Fig. 89 £84 to 150 0 0
128 =Berkley's Anemometers= fitted up to order, _to suit the Observatory_.
131 =Gold Leaf Electrometer=, Fig. 90 1 1 0
134 =Bohnenberger's Electroscope=, Fig. 91 8 8 0
=Lightning Conductors= fitted up to order.
146 =Leslie's Differential Thermometer=, Fig. 93 £1 10s. 2 2 0
148 =Thermometer Stand (Glaisher's)= 3 3 0
149 =Thermometer Screen= for Sea use 3 3 0
150 =Anemoscope=, or Portable Vane, Fig. 94 2 5 0
157 =Sea Water Hydrometers=, Board of Trade Marine, Figs. 96 and 97 0 5 6
158 =Newman's Self-Registering Tide Gauge=, Fig. 158, fitted to the Building to order From 50 0 0
_Further Information as to Price, &c., will be found in_ NEGRETTI & ZAMBRA'S ENCYCLOPÆDIC CATALOGUE OF MATHEMATICAL, PHILOSOPHICAL, OPTICAL, PHOTOGRAPHIC, AND STANDARD METEOROLOGICAL INSTRUMENTS,
_Containing very numerous Comparative Tables of Reference, and Illustrated by upwards of_
Royal 8vo. Cloth, Gilt Lettered--Price 5s. 6d.
[1] Second Number of "Meteorological Papers," issued by the Board of Trade.
[2] With reference to these barometers, we have received the subjoined testimonial, with permission to use it as we please.
"The barometers which you have lately supplied to Her Majesty's ships through this Office are much approved, being good for general service, afloat or on land.
[3] _Vide_ C. Daubeny, F.R.S., "On Climate."
[4] _Vide_ Report of the British Association, 1862.
[6] The quotations in this section are from Tyndall's _Heat considered as a Mode of Motion_.
[8] Leslie _On the Relations of Air, Heat, and Moisture_.
[9] Tyndall's _Heat considered as a Mode of Motion_.