Tue MICROSCOPE. 107 
microscope the eye is at the large end where there is the least 
amplification. 
Another relative view of the instruments is that the teles- 
cope is a microscope plus an apparatus to bring the distant ob- 
ject near enough to examine it with a magnifier. The telescopic 
object-glass forms an aerial image, of the heavenly body exam- 
ined, in the focus of the magnifier, and this intangible image is 
examined as if it were a material thing. From this point of 
view the telescopic eye-piece is the microscope and could be 
replaced by an ordinary compound instrument. That is not 
only theoretically but practically true, and I have tried it. My 
success was not remarkable but it was sufficient to show that 
the present telescopic eye-pieces could be profitably replaced 
by suitable microscopes. I suggested it to a prominent instru- 
ment-maker and I have reason to think he has been experi- 
menting on it. 
A peculiarity of the microscope, not participated in by the 
telescope, is that the former utilizes diffraction—seeing while 
the latter does not. This characteristic of the microscope is a 
recent discovery of Prof. Abbe. of Germany. An account of it 
can be found in his publications andin the Journal of the Royal 
Microscopical Society.” 
SE hd 
RESULTS OF MICROSCOPICAL RESEARCH. 
ahi beyond the control of the editor necessi- 
tated an interruption in this series of abstracts since the be- 
ginning of last year. He now hopes that they may be frequently 
presented to his readers. The abbreviations of the names of 
the journals quoted from are indicated in the last volume. 
Suckers of the Lump-suckers—Several genera of marine 
fishes are characterized by the presence of a sucker on the low- 
er surface, by means of which they are enabled to adhere to 
stanes, etc. Mr. Maurice Stuckens (Bull. PAcad. Roy. Belg. 
III, viii, 74-84, 1884) describes the structure of these suckers in 
the genus Ziparis making comparisons with the normal struc- 
ture of the fins in the perch and illustrating his results by a 
plate. 
The Head-kidney of Polygordius.—Three genera of worms 
