RECREATIONS WITH THE MICROSCOPE 



379 



Edited by Dr. V. A. Latham, 1644 Mors 



Chara and Nitella to Show Cyclosis. 



Select vigorous growing young 

 "leaves" and mount on plain or hollow 

 ring slide in water. Examine under 

 the microscope to find the cells which 

 show cyclosis, i. e., flowing motion of 

 the protoplasm — most clearly. Note 

 their contents and use low and high 

 powers to study. Mount fruiting 

 branches showing various stages of de- 

 velopment of antheridia and oogonia 

 in water in hollow ground or open top 

 cells. Crush and tear apart mature an- 

 therida, oogonia, and spores in water 

 on plain slides. Test with iodine of 

 a weak solution by putting a small 

 drop at the upper edge of the cover- 

 glass and watch as its brown color 

 diffuses down through the water while 

 the starch grains in the cells immedi- 

 ately turn blue. For permanent prep- 

 arations the water can be displaced by 

 using a drop of Hantsch's fluid (gly- 

 cerol-glycerine one part, alcohol three 

 parts and water two parts) putting a 

 drop at one side, and at the opposite 

 side touching the water with bits of 

 blotting- paper and gradually drawing 

 the fluid through. It can be boiled 



slightly to drive out air and keep adding 

 fluid till the water and alcohol are driven 

 off, and then glycerol added to fill the 

 specimen and cool quickly. Later ring 

 very carefully, being sure no glycerol is 

 around to prevent the cover and cement 

 from sticking fast. 



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e Avenue, Rogers Paik, Chicago, Illinois. 



The best slides that we have received 

 from a foreign worker and in wide range 

 of subjects are made by J. B. Howard, 

 45, Frenchgate, Richmond, Yorks, Eng- 

 land. For cross sections of woods and 

 for a variety of other subjects his work 

 is fine. 



W e must also remember the name of 

 Walter F. Herzberg, 160 East Ontario 

 Street. Chicago, so famous for his beau- 

 tiful slides. Especially is he skillful in 

 the Diatomaceae. 



^ Miss M. A. Booth, 60 Dartmouth 

 Street, Springfield, Massachusetts, also 

 continues her excellent micro-slides and 

 photographs. 



Miss E. M. Drury, 45 Munroe Street, 

 Roxbury, Massachusetts, supplies botan- 

 ical slides and school series. 



This is not an advertisement but an 

 effort to extend the pleasurable use of 

 the microscope. 



Microscopical Art at Its Best. 



If you have a microscope you should 

 obtain at least a few of the high grade 

 microscopical slides made by Powers & 

 Powers, Station A, Lincoln, Nebraska. 

 The technique is perfect, and the slides 

 are the best, unquestionably the best, that 

 have come to ArcAdiA. The prices are 

 reasonable. The subjects are for the 

 greater part aquatic. Get their catalogue. 



The Micrologist. 



So far two volumes of this little 

 magazine have been issued at a nominal 

 price 1-6 quarterly. The subject mat- 

 ter is excellent and covered in a very 

 convenient manner. 



Part 1. Introduction The Microscope 



Lenses and Their Magnification. 



Angle of Aperture and a Method ot 

 Determining the Same. 



Dry Mounting and Formula. 



Making Cardboard Rings and Ring- 

 ing, with excellent photographs of the 

 process. 



With the number is a plate with five 

 figures showing (1) Dried Leaf of 

 Onosma, (2) Dried Seeds of Spergu- 

 laria marina, (3) Spicules of Gorgonia, 

 (4) Heap or Spread Slide of Polycis- 

 tina and (5) Eggs of Feathered Gothic 

 Moth. 



Another issue treats of Protozoa and 

 forms a handy little monograph in it- 

 self and plate. Another, sponges, three 



