wvournal, Sept TG] PROGRESS OF MICROSCOPICAL SCIENCE. 161 
of the size of the aperture of the stage and the diameter of the tube 
which connects the sub-stage with the cap A is equal to the movement 
of the mechanical stage, and this is found more than sufficient. D is 
the clamp by which the finger is attached to the stage by means of the 
screw EH. A steel cylinder G is nicely fitted into the top and bottom 
of the tube F, leaving room inside fora light spring to press the steel 
cylinder upwards. ‘To prevent turning, the spring J is provided, at 
H, with a steel pin accurately fitted into the fork at the top of the 
tube F. By turning the nut K the spring J is elevated and depressed, 
giving nice adjustment to the needle N, in case the finger is to be 
attached to a microscope not having rack-movement to the cap B, to 
bring the end of the hair and the object in close approximation. The 
end of the spring J forms a little ring, with a screw cut inside, into 
which a cork M is screwed to receive a needle N, to which a hair is 
fastened by wrapping gum-paper around. Turning the cork facili- 
tates the adjustment of the hair to the proper inclination. <A slight 
pressure on the button L brings down the hair, and the spring, inside 
of F, instantly lifts it again when the pressure is removed. The 
tube F turns in the clamp D in order to adjust the hair and cork more 
conveniently, and when brought back again it is tightened by a set 
screw. Complicated as it may appear, only one movement is added 
to the microscope stand by this instrument, the one, viz. which gives 
the vertical motion. When the apparatus is to be used the material 
you want to select from is placed on the sub-stage C and focussed, 
then the point of the hair is approximately brought over the selected 
object by means of the stage movements and turning of D; this brings 
the hair nearly in focus too, because it is almost in the same plane 
with the object. We next adjust the hair precisely over the selected 
shell, press down the button L, and the shell will adhere to the hair. 
Now we remove the slide with the material and substitute a glass 
slide, moistened by breathing on it, and having brought it in proper 
position, briskly dip down the button L again and the shell will be 
deposited on the glass slide. As the mechanical stage has a graduated 
indicator, the finger may be moved along regularly, and shells may 
be placed at equal distances in lines. After the cover-glass is care- 
fully placed over it, then Canada balsam may be run in by capillary 
attraction without disturbing the position of the shells. 
Report upon a Specimen of Anemone nemorosa infested by a Fungus. 
—This fungus is, according to Prof. A. M. Edwards, a species quite 
common both in America and Europe, upon the true leaves of the 
Anemone in early spring, and has been named Puccinia Anemones. In — 
Ray’s ‘Synopsis’ * it is described in company with true ferns, and 
was for a long time supposed that the deeply-cleft leaf of the Anemone 
with the brown spots upon its under side was a fern with sori. As 
Ray says, “this capillary was gathered by the Conjuror of Chalgrave,” 
hence it has come to be known as the Conjuror of Chalgraye’s fern. 
This fungus, like the other microscopie parasitic ones, grows beneath 
the surface of the plant, throwing out its threads of mycelium among 
* 3rd edition, 1724. 
