6 Mr. Bauer’s microscopical observations on the 
effected in one hour and twelve minutes. The eggs, after 
the worms have quitted them, soon shrivel and decay, and 
it seems they ultimately dissolve, as in a very few days they 
entirely disappear, as well those in the water, as those that 
have been hatched within the germens. 
The young worms are somewhat smaller and more trans- 
parent than those which are found in the more mature grains, 
but in a very short time after they have mixed with the 
others, they cannot be distinguished from them. Those which 
are found in the cavities of the mature grains, are nearly all 
of the same size ; they are from to --g- part of an inch in 
length, and , - - 5 q part of an inch in diameter. They are 
milk-white, semi-transparent ; and if viewed with the strong- 
est magnifying power, appear annular, like the large worms, 
though no external indentations are observable ; they appear 
like fine glass tubes filled with water, and containing many 
air bubbles in close succession, and of the same number as 
the rings or joints in the old worms. At both extremities 
( one of which is more sharply pointed than the other ) , there 
are no such divisions or joints perceptible. These extremi- 
ties are each about of the whole length of the worm ; they 
are perfectly transparent, and appear like solid glass. 
Respecting the sex of these minute animals, I could never 
discover any external distinction. The old worms in the 
same germen are almost every one of a different size ; they 
have all the same proboscis and the same orifices. Three 
of the seven worms from the same grain which I first ex- 
amined, were laying their eggs at the same time, though 
they were not of precisely the same size ; but the other four 
did not ; they were considerably smaller, and evidently much 
