L. CASELLA'S CATALOGUE 



a - 



30 



A 



FIG. 6. 



FIG. 1**. 



12. Glass Case for Standard Barometer, of black polished wood, with plate-glass sides 



and front, forming a neat and elegant protection against dust, etc., for either 

 of the Standard Barometers . . . 3 to 4 



13. Standard Marine Barometer on the Kew principle, as used by the Admiralty 



and Meteorological Office, and recommended by the Brussels Conference, 

 for making correct meteorological observations at sea. The cistern is made 

 of bronzed polished iron. The frame is brass bronzed, and revolves in gimbals, 

 having a stout spring arm for suspension. The scale reads to SOOths of an inch, 

 and the tube is contracted to prevent oscillations during the heaviest rolling 

 of the ship (fig. 13, p. 5) . . . . . 450 



