g2 NATURALISTS’ ASSISTANT. 
Lieberkuhns, parabolas, etc., etc., are but rarely used by the 
true student and need not be described here. . 
This is a good place to say a word about the ‘“ Novelty,” 
“Globe,” “Craig,’’ and other microscopes which are extensive- 
ly advertised and as extensively recommended by clergymen, 
teachers, and others. ‘These microscopes, furnished for twen- 
ty-five cents, are said to magnify 10,000 times, to show 
animalcules in water and various other wonderful things, but 
they are merely catch-pennies, and the clergy who recommend 
such worthless instruments are entering a field in which they 
are perfect ignoramuses. ‘These cheap microscopes are 
poorly made, give distorted and misleading images, and in a 
word are worse than useless. ‘The Craig is perhaps the worst 
of the lot. 
DIFFERENT FORMS OF MICROSCOPES. 
From the days of Adams, Baker, Trembley, and the older 
investigators, microscopes have been used extensively by 
naturalists, and of course in these years various styles of in- 
struments have originated, but all forms now manufactured 
may be roughly classified under two heads, the English and 
the Continental patterns. The latter are almost always 
small, of great simplicity, and those of the prominent 
makers like Zeiss, Hartnack, Merz, or Nachet, are invariably 
of good workmanship. ‘These have either a circular or horse- 
shoe base from which arises the support of the working por- 
tions of the instrument. The stage is almost invariably of 
