24 THE CANADIAN NATURALIST. [March 



has been altered and adapted and improved in ahiiost all its parts, 

 but like our .growing selves there it is, the good steady well 

 finished stand of Pillischer, No. 2, first-class. I have learned 

 a great deal in pursuit of improvements upon the instrument, and 

 though probably, it has proved the most expensive way of pro- 

 cedure, yet I feel grateful for the experience it has brought me 

 during the process. 



But of late years the requirements of the Naturalist have been 

 so well studied by the leading English manufacturers, that every 

 essential is comprised in moderately priced instruments. Amongst 

 these, I should select for a friend a Smith & Beck's popular Micro- 

 scope. I have had several through my hands on the way to 

 friends to whom I have recommended them, and I have been 

 more than satisfied with their excellency. The stand and the 

 powers are alike deserving of the highest praise. 



The stand is of peculiar construction, having a hinged or fold- 

 ing foot attached to a triangular base, with studs to fix the 

 instrument steadily in the perpendicular position for dissection, 

 three positions of inclination for the sitter, and the horizontal for 

 drawing or for direct illumination. It has excellent rack work 

 and lever adjustments, and may be fitted with all the modern 

 valuable accessories for varied illumination. With 1 in. and J in. 

 object glasses, 2 eye pieces, concave mirror and condensing lens, 

 diaphragm, stage forceps, glass plate and pliers, in mahogany 

 case, this instrument is sold at £10 sterling. 



The same, with Wenham's binocular, 3 object glasses, 2 in., 

 1 in. and ^ in., two sets of eye pieces, etc., etc., £15. 



The whole complete, with binocular arrangement, Lieberkuhns, 

 dark wells, acromatic condenser, parabolic reflector, polarizing 

 apparatus, camera lucida, micrometer, live box, zoophyte trough, 

 and an excellent ^th objective, £25 sterling. 



I should strongly advise any friend who was tired of a plain 

 instrument, and who wished to get some of these charming acces- 

 sories, to s 11 it, and invest in the above very complete set, and 

 I am sure if he works the instrument tl oroughly he need not envy 

 the happy possessor of a " first class Microscope," three times its 

 value. 



T mu&t now, in accordance with my plan, address myself to the 

 fortunate man who wants a " first class instrument," or who^ 

 having a good stand and glasses wi hes to know what he should 

 add thereto. To the first I would say, you may, with equal 



