I. SPECIAL COLLECTIONS. 567 



Minimum Ditto, B. T. 216 (10,435) ; certificates of verification 

 in boxes. 



Copper Rain, and Snow Gauge, Can, and Glass, by Casella, 

 M. O. 150. 



Solar Radiation Thermometer, in vacuo ; Negretti's Maximum, 

 with platinum points for testing, Hicks, M. O. 10, 



Terrestrial Radiation Thermometer, hollow bulb for sensitive- 

 ness, Hicks, 18,429. Meteorological Committee. 



2789a. Milne's Barograph, by West, clockwork, by Schoof. 



Meteorological Office. 



2789b. Portable Barometer, graduated on the glass tube 

 with a sliding vernier, invented and used by Sir John Richard- 

 son, M.D. Meteorological Office. 



2789c. French Standard Barometer, by Tonnelot, J.G. 

 48, cistern of large diameter to diminish capacity error, with box. 



Meteorological Office. 



2789d. Lament's Atmoxneter. Meteorological Office. 



2789e. Wall Screen, for registering thermometers. 



Meteorological Office. 



2789f. Tube, Lath, and Thermometer, by Hicks A 164, 

 for taking earth temperatures. Meteorological Office. 



2789g. Hypsometer Apparatus, as improved by Dr. G. 

 Henderson, with two maximum thermometers, by Hicks, 39621, 

 39622, in leather sling-case, with certificates. 



Meteorological Office. 



2789h. Johnson's Deep-sea Pressure Gauge, A 1, with 

 box. Meteorological Office. 



27891. Deep-sea Thermometers : 



Johnson's metallic, A 6. 



Negretti's protected bulb, A 9. 



CaseUa's protected bulb, 21260, with certificate. 



Elliott's unprotected, with certificate, A 36. 



Pastorelli's unprotected, No. 5, out of order, used by Sir J. C. 

 Ross. Notwithstanding the thickness of the glass a similar instru- 

 ment to this rose 9*2, under a pressure of two tons on the square 

 inch. Meteorological Office. 



2789k. Quarterly Journal of the Meteorological 

 Society, Vols. I. and II., 1872 to 1875. Meteorological Office. 



