45, CORNHILL, E.G., AND 122, BEGENT STEEET, W., LONDON. 85 



112. Rain Gauge (fig 97), having a receiving surface of 12 inches diameter, 

 arid graduated glass tube divided to inches, tenths, and hundredths of an inch, 

 showing by simple inspection, without the use of a graduated measure, the 

 amount of rain fallen. In japanned metal, with tap for emptying the gauge. 



Price . . . 2 10 Ditto, ditto, in Copper . 3 10 



113. Rain Gauge, a similar but rougher form of No. 112, without brass 

 mountings, and instead of the graduated glass tube, it is fitted with a boxwood 

 scale, attached to a metal float inside the gauge, on which can be read off, by 

 simple inspection, the amount of rain fallen. Price, complete, 220 



The Rain Gauges (Nos. 112 and 113), are not suitable for measuring 

 small quantities, but are useful where the rainfall is excessive. 



1 14. Admiral FitzRoy's Rain Gauge, with graduated glass dipping tube, 

 steadying rods or supports, and frame, now very rarely used. 



Price, in Stout Copper 330 



115. Pocket Rain Gauges, with 3-inch receiving surface and correspond- 

 ing measuring glasses, have been made by Messrs. Negretti and Zambra, but 

 they cannot be recommended. 



116. Square Rain Gauge, having a receiving surface of 10 inches by 10 

 inches, and about L2 inches in height, made of stout copper with a graduated 

 glass measure divided into one hundredths of an inch, as described in Col. Sir H. 

 James's instructions for taking meteorological observations for the use of the 

 Royal Engineers ; the Gauge is shown partly in section, (fig 98.) Price, 2 10 



117. Meteorological Office Rain Gauge. Our woodcut (fig. 99.) shows 

 a recent form of 8-inch Rain Gauge introduced and recommended by the London 

 Meteorological Office. It will been seen that essentially this form of gauge is 

 the same as Glaisher's, but with an additional vertical cylinder about 6 inches 

 above the funnel its use is to prevent in splashing and also most especially to 

 collect and measure Snow. Price, with graduated measure, in Japanned Metal 220 



Ditto in Copper . . 2 15 



118. The Snowdon Rain Gauge. Mr. Symons has made some improve- 

 ments in the arrangement of his Gauge, these are chiefly the addition of a 

 vertical cylinder above the funnel and doing away with the openings in the 

 external case enclosing the receiving bottle ; also Mr. S. advises that the 

 gauge be almost entirely plunged below the surface of the earth as a protection 

 from evaporation by heat, and breakage by frost another advantage of the 

 close cylinder is that should the collecting bottle be broken by frost or other- 

 wise its contents will be saved to the observer. The form of this Gauge is that 

 of fig. 95. with a collecting funnel and cylinder of 5 inches diameter. This 

 instrument is named by Mr. Symons the Snowdon Rain Gauge. 



Price, complete in Galvanised Metal, with graduated measure . 12 6 

 Ditto, ditto in Copper . , . .150 

 Mr Symons' Certificate for either of the above, 2s. 6d. 



