42 



THE VOYAGE OF H.M.S. CHALLENGER. 



Ordinary Sounding Gear Supplied. 



Surveying Instruments Supplied. 



Meteorological Instruments Supplied. 



Marine barometers, 



Mountain barometers (syphon), 



Aneroids, .... 



,, pocket, 



Anemometers, 



Rain gauges, .... 



Thermometers (dry- and wet-bulb), 

 Pocket thermometers, 1 . 

 Maximum and minimum thermometers, 

 Hydrometers, .... 



2 

 24 

 12 

 24 

 12 



1 Some of these should be constructed to register up to the boiling point, for use in testing thermal springs. 



