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Updated: June 16, 2025
The old male cells can be recognized by their position on the outer edges and by their capacity, measuring on an average the same as a column of sand 31 millimetres high in a glass tube 5 millimetres wide.
It is a tiny, dull-white cylinder, about three millimetres long by half a millimetre wide. From it run numbers of filaments which actuate the feet and the powerful muscular layer which is the creature's essential motor organ. When examined merely through the pocket-lens, this cylinder appears to be slightly furrowed transversely, a proof of its complex structure.
"Those are the Red Fleet destroyer flotilla, which is too frail to panic about among the full-blooded cruisers inside Portland breakwater, and several millimetres too excited over the approachin' war to keep a look- out inshore. Hence our tattics!" We wailed through our siren a long, malignant, hyena-like howl and a voice hailed us as we went astern tumultuously.
The situation was all the more critical for the reason that the next obstacle was a brook, only two metres wide, but of which the passage was obstructed on the farther side of the track by heavy beams, laid one on top of another, solidly riveted and measuring one metre and ten millimetres from the base to the summit. The excited horse charged obliquely toward this obstruction with all his might.
The front cylinder, the one which projects a little way outside the hive and forms the entrance-hole, varies in width between 8 and 12 millimetres. In this way I shall obtain a greater variety in the distribution of the sexes.
In 1867 the difference between the highest and lowest barometrical readings was not more than 13.96 millimetres, and would have been much less if the mercury had not been much depressed by storms in July and September. The hourly variations amounted to very few millimeters. Daily reading of the barometer.
If we now divide the maximum breadth by the maximum length and multiply the result by 100 we get what is known as the cephalic index of the skull. Thus if a skull has a length of 180 millimetres and a breadth of 135, its cephalic index is 135/180 X 100, i.e. 75. It is clear that in a roundish type of head the breadth will be greater in proportion to the length than in a narrow elliptical type.
This feature may be easily observed with an ordinary induction coil by taking the primary out, plugging up the end of the tube upon which the secondary is wound, and filling it with some fairly transparent insulator, such as paraffine oil. A primary of a diameter something like six millimetres smaller than the inside of the tube may be inserted in the oil.
A prodigious change in the behavior of matter is wrought by life, and whether we say it is by chemical laws, or by a life force, the mystery remains. The whole secret of life centres in the cell, in the plant cell; and this cell does not exceed .005 millimetres in diameter. An enormous number of chemical reactions take place in this minute space. It is a world in little.
I enclose them in spacious reed-stumps, equal in diameter to the natal cell. The obstacle to be pierced is the natural diaphragm, a yielding partition two or three millimetres thick. The less vibrant ones succumb, stopped by the frail barrier. What would it be if they had to pass through a thickness of oak?
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