nd taining the yolk or vitellus. The first’ step. in the develop- the valve, by which the steam is turned up against the disk, ment of the egg is the formation of innumerable cells on the C. K isa lever of any suitable length for trying the valve. surface of the vitellus,which are closely packed… … of forming one straight furrow, for two heads, while one tail has to do lower than when the valve commences to alarm. for both. OPERATION.— When the valve, A, begins to rise, the steam As far as has been observed, it is always the anterior part will pass through the nariow space (about one…
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