lii METEOROLOGY OF BEN NEVIS. 



LIST OF INSTRUMENTS. 



Fortin Barometer, No. 1385, made by Negretti & Zambra, London, graduated from 22*3 inches to 



3L2 inches, and reading on vernier to O002 inch; scale correction + - 006, which has been 



applied to its readings ; compared at Kew in June 1883. 

 Fortin Barometer, No. 1252, made by Nigretti & Zambra, London; graduated from 230 inches to 



3L2 inches, and reading on vernier to - 002 inch; scale correction +0"010, which has been 



applied to its readings ; compared at Kew. 

 Redier Aneroid Barograph, with recording papers. 



Do. Thermograph, with recording papers. 



Thermometers with Kew Certificates. — Standards Nos. 178490 and 178491, made by Adie and Wedder- 



burn, Edinburgh ; graduated from 0° to 230° and from — 30° to 235° respectively ; scale 



correction nowhere exceeding 0°T. 

 Ordinary, with glass scales, Nos. 192660, 192671, 192,672, and 192677, made by Adie & Wedder- 



burn, Edinburgh ; also No. 50850 and 50852, made by Negretti & Zambra, London, but 



fitted with glass scales by Adie & Wedderburn, Edinburgh. 

 Ordinary, with porcelain scales, Nos. 50851, 50953, and 50945, made by Negretti & Zambra, 



London. 

 Ordinary, with cylindrical bulbs and scale numbers etched on stem No. 50524, made by Negretti 



and Zambra, London; and Nos. 63728 and 63729, made by Adie & Wedderburn, Edinburgh. 

 Black Bulb in vacuo, No. 484108, by Hicks, not maximum. 

 Registering Maximum, with metal scales, Nos. 117293 and 138590, made by Adie & Wedderburn, 



Edinburgh. 

 Registering Minimum, with metal scales, Nos. 116918, 138545, and 138533, made by Adie and 



Wedderburn, Edinburgh. 

 Registering Maximum Black Bulb in vacuo, No. 186, made by Hicks, London. 

 Tliermometers without Kew Certificates. — Ordinary, with metal scale, No. 7, made by Frazer, Edin- 

 burgh. 

 Ordinary, with cylindrical bulb and scale numbers etched on stem, made by Kemp, Edinburgh, 



for Professor Chrystal's Hygrometer. 

 Three, with different sized spherical bulbs, made by Kemp, Edinburgh. 



Turn-over Thermometers for clock, Nos. 50198 and 50199, made by Negretti & Zambra, London. 

 Maximum, on wooden frames, Nos. 108 and 2113, made by Negretti & Zambra, London. 

 Maximum Black Bulb in vacuo, with radiometer attached, No. 64, made by Hicks, London. 

 Minimum, on wooden frames, Nos. 1447 and 1449, made by Negretti & Zambra, London. 

 Minimum, with metal scale, made by Fraser, Edinburgh. 

 Radiation Minimum with hollow cylindrical bulb, No. 46309, made by Hicks, London. 



The above thermometers are all graduated on the stem to single degrees. Those with Kew 



certificates are used for the ordinary observations ; their scale correction in no case exceeds 



0° - 3. Those without Kew certificates are only used occasionally, and are then compared 



with the Observatory standards, Nos. 178491, and 178490 and the corrections so found applied 



to their readings. 

 Rain and Snow Gaurjes. — 



Two eight-inch Gauges, with screw taps. 

 Two five-inch „ stop cocks. 



Six five-inch „ screw taps. 



The last set are those in ordinary use ; they are made all in one piece, with extended bases 



rounded underneath so as to be easily levelled when resting on snow. 

 Three five-inch Measuring Glasses, graduated to 0'01 inch. 

 Three Spirit-Levels. 

 Glass Carboy and Funnel for collecting rain-water. 



