650 



Meteorological Appa-atus. 



No. 55 420 - 



55420. 1:|10. 



55423. 1:11. 



55 426. 1 : 4. 



55 425. 1 : 5. 



55 427. 1 : 6. 



Meteorological Apparatus. 



s. d. 



Chamber and Siphon Barometers, Staton and Travelling Barometers, Altitudinal Barometers and Aneroid 



Barometers: sec pp. 372377, Nos. 52,771 52,806. 



Recording Aneroid and Mercurial Barometers: see p. 377, Nos. 52,8(1852,810. 

 Cathetometers: see pp. 224, Nos. 51,463 51,466. 

 Reading Microscopes: see pp. 226 and 227, Nos. 51,473 51,477. 

 Thermometers: sec pp. 576 579, 54.845 54,877. 

 Thermographs: sec p. :,'<>. Xos. 54,878 54,885. 



Boiling and Freezing Point Determination Apparatus: see p. 580, Nos. 54.8H7 54,889. 

 Thermometer Comparators and Calibrating Apparatus: see p. 225, Nos. 51,467 51,468. 

 Distance Thermometers: sec pp. 584 587, Xos. 54,912 54,944. 

 Thermometer Testing and Comparing Apparatus: see p. 581. 



55,420. Thermometer Screen alter atephenson, Figure, 

 with double blinds . 



for 4 or more thermometers, 



Vi.lLM. Earth Thermometer after Lament, divided in l j b , from 10 to + 50" <'., for 0.25 in 



depth, in brass mount with steel point 



.V>. 122. -- idem, for 0.5 m depth 



."..">. 123. -- idem, for 0,75 m depth, Figure 



.">.">, H'l. - - idem, for 1 m depth 



55,425. Earth Minimum Thermometer, F i g u r e, very sensitive, spirit filled and with thermo- 

 meter vessel in form of hollow cylinder 



Cl. 1968, 1971 

 4106, 197-2, 



2.10.0 



0. 18.0 



1. 2. I" 

 1. 4.0 



l. Ki.o 



1. 0.0 

 3829. 



