APPENDIX. 955 



4OOOk. Singing Flame Apparatus. 



4O001. Singing Flame Apparatus [octave higher]. 







HEAT. 



4OOOm. Differential Thermometer. 

 4OOOn. Alcohol Thermometer. 

 4OOOo. Mercury Thermometer. 

 4000p. Bulb for determining Expansions. 



4OOOq. Apparatus for measuring Absolute Expansion 

 of a Liquid. 



40OOr. Flask with Delivery Tube. 

 4OOOs. Conductivity Cones. 

 4OOOt. Hygrometer. 

 4000u. Ventilation Apparatus. 



LIGHT. 



4OOOv. Fin Hole Camera. 



40OOw. Instrument for measuring Vertical Heights. 



4000x. Circle Dividing Board. 



4OOOy. Multiple Image Apparatus. 



4OOOz. Concave Mirror. 



40OOaa. Convex Mirror. 



4OOOab. Three Glass Bulbs and Beakers. 



4OOOac. Glass CeU. 



4OOOad. Bisulphide of Carbon Frism. 



40OOae. Spectroscope. 



4OOOaf. Folariscope. 



