116 THE MICROSCOPE. Aug. 
will bend over and hold the ring. After this has been 
satisfactorily done a glass cylinder must be obtained. * 
This is simply an ordinary glass shade with the top cut 
off. These may be obtained at some of the stores; but 
if not, a shade can be easily cut, so that when ready it is 
open at both ends. The size of the cylinder must depend 
upon the diameter of the dish or saucer. It should be 
about 1 in. less than the latter, so as to stand within 
freely. To form a cover for the top, a piece of fine 
white muslin or net should be obtained, cut and pasted 
to the edge of the glass. It had better be as large a 
mesh as possible, so as to allow free access of air. A jar . 
is now required to hold the water in which the stems of 
the food-plant may be placed. This should be of suffi- 
cient size so as to take in the foot of saucer or basin. The 
food-sprigs must be passed through the hole into the 
water, and when finally arranged should be as shown by 
fig 8. 
In order to excel in the art of insect rearing; it is 
necessary to build what is known as‘a butter-fly park or 
vivarium, which.in structure is something like a fern- 
case. This will enable the collector to observe the many 
wonderful changes that take place in insect life, and if 
this house is carefully constructed, it will also serve as an 
ornament to the drawing-room or study. This house is 
not difficult to build and fit. Insect rearing is not an oc- 
cupation for summer only, but one that can be followed 
very nearly the year through, having, of course, regard 
to the temperature, for many species of insects hybernate 
during winter, especially those of the later broods, 
Though not so much care and attention is needed during 
the wintcr months, the chrysalids or pup will require 
attention and proper keeping so as to perfectly develop 
in early spring. Moreover, during the late autumn and 
mild days of winter, pupe digging may be taken up to 
the advantage of the collector.—English Mechanic. 
