IN MICROSCOPIC INVESTIGATION. 357 



For Artificial Illumination. 



NECESSARY. ADVANTAGEOUS. 



7. Small paraffin lamp. 25, pi. XI, Smith and Beck's cam- 

 fig. 47. phine lamp, or Mr. 



Highley's gas lamp. 

 26, pi. XI, fig. 49. 

 Bockett Lamp. PI. XI, 

 fig. 48. 



III. Apparatus for Drawing Objects- 



8. Neutral tint glass reflector. 44, 



pi. XIII, fig. 60. 



9. Common hard pencils, steel pens, In- 

 dian ink, fine Bristol board, smooth 

 white paper. 



IV. Apparatus for Measuring Objects and for Ascertaining the 

 Magnifying Power of the Object-Glasses. 58 to 66. 



10. Stage micrometers divided into looths Nobert's lines, which 



and i,oooths of an English inch. may be used also as 



60. test objects. 61. 



Neutral tint glass reflector. 44, Maltwood's finder, or 



pi. XIII, fig. 60. the arrangement de- 



scribed in p. 42. 



V. Instruments and Apparatus' for General Purposes. 



11. Wire retort stand. 70, pi. XIV, Water lath. 73, 

 fig. 69. pi. XIV, figs. 73, 74. 



12. Tripod wire stands. 71, pi. XIV, 

 figs. 71, 72. 



13. Spirit lamp. 69, pi. XIV, fig. 70. 



1 4. Evaporating basins. 



15. Watch glasses. 85. 



1 6. Thin glass. 84. 



17. Plate-glass slides. 83. 



VI. Instruments for Making Dissections and for Cutting Thin 



Sections of Soft Tissues. 



1 8. Common scalpels. 74. Valentin's knife. 77, 

 i8. Double-edged scalpel. - 75, pi. XIV, pi. XV, figs. 78, 79. 



fig. 75. Spring scissars. 79, 



pi. XV, fig. 84. 



