We will see on the other hand that when the symbiotic association has continued for a long time it may be very difficult to obtain ultrapure colonies. In this last case it is necessary to adopt special methods of isolation.

The wipeout of this industry could be catastrophic.

They were such a responsive audience, for one thing, so unlike the academic hand-sitters he was used to, and they'd turned out in such large numbers, despite a heavy downpour, filling the basement of the First Presbyterian Church to capacity, even standing in the back and along the walls.

She was stronger, larger, more robust physically than he had hitherto conceived.