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Weissman himself is a microscopist of more than common skill. He is thoroughly accomplished in the most modern methods of killing, fixing, staining, and mounting. This worker's acquaintance with the intimate structure of the cell is probably as great as that of any other man in the world.

To-night at midnight we report our position to Zeebrugge, up till now we have maintained wireless silence for fear of the British and French directional stations picking up our signals and fixing our position. After supper this evening Von Weissman explained to me the general plan of our operations for the next eight days.

This is undoubtedly true of the individual, and although Weissman insists that it is useless to the species as a whole, many zoölogists are slow to relinquish entirely the idea that somehow these favorable developments become reproduced in the offspring. Professor Cope, the American paleontologist, was a strong believer in the effect of activity, both upon the individual and upon his descendants.

We had no trouble coming up channel to-day, which seems singularly empty, at any rate in mid-channel, where we were. We got back about three hours ago, and as I was appointed temporary to the boat, Von Weissman kindly allowed me to leave her and come up to Bruges as soon as we got into the shelters at Zeebrugge. I got up here just, in time for a late dinner.

"We have always thought it a grave initial misfortune to have lost half our little world. Perhaps that is one reason why we have so striven for conscious improvement." "But acquired traits are not transmissible," Terry declared. "Weissman has proved that." They never disputed our absolute statements, only made notes of them.

Weissman immediately dived and, without deviating a degree from his course, held on at three-quarters speed on the motors. Some time later the hydrophone watchkeeper reported the sound of propellers in his listeners, and that he judged them to be close at hand, so I imagine we passed very nearly directly underneath whatever it was.

Weissman also went to sea again for a short trip in the Channel, and has not reported for five days. Perhaps he has despised the Dover Barrage once too often. If this is so, it is a great loss to the service: he was a man of iron resolution in underwater attack. I feel I ought to despise Zoe, but I can't. I love her too much; after all, am I not perhaps encasing myself in the robe of a Pharisee?

He opposes the Arnauld de la Perriere school of thought, which pins faith on the gun, and Weissman has done nearly all his work with the good old torpedo. Altogether, undoubtedly a man to serve with. The U.39 was in that buzzing and semi-active condition which to a trained eye is a sure indication that the ship is about to sail. Punctually at five minutes to 2 a.m.

The two wounded men were cautiously making their way aft to the conning tower, and I called for a couple of stokers to come up and carry away the third, when Von Weissman suddenly gave the order to dive. The gun's crew at once made a rush for the conning tower, and were down the hatch in a trice, one of the wounded men fainting at the bottom.

Many biologists since his time have doubted whether unaided Natural Selection will account for the constant advance in organisms. This is the part of the work which is often seriously questioned. Weissman and his co-workers have contended that this unaided principle will serve.