iy 6 PRACTICAL PHOTO-MICROGRAPHY. 
Swift s Nelson-Dalhnger Lamp, with doubleparalleliser, £ s. d. 
Iris, extra . D12 0 
Heliostat, fig. 23 ... ... ... ... ... ... 5 10 o 
Newton’s Lime Jet, “ Pringle Cut-off,” fig. 26. 276 
MISCELLANEOUS. 
Enlarging Apparatus, Hume’s Cantilever, 4m condenser, 
projection lens, etc., fig. 34 ... ... ... ... 3 15 o 
Microtome, Minot... ... ... ... ... 10 o o 
» ,5 with knives and sundry fittings .. 13 o o 
Paraffin Stove, or Incubator, Hearson’s patent, T2 by 12 
by 14 inches inside ... .. ... ... ... 6100 
The purely photographic outfit—dishes, lamp, chemi¬ 
cals, etc.—ought not to cost more than £1 10s. or £ 2. 
These prices represent the best articles of their kind. 
In many cases much cheaper instruments, if well chosen, 
would suit for good work. 
