United States or Brunei ? Vote for the TOP Country of the Week !
Experiments by Van der Steer, at the Helder, in the years 1861 and 1862, showed, for the former year, an evaporation of 602.9 millimetres from water, 1399.6 millimetres from ground covered with clover and other grasses; in 1862, the evaporation from water was 584.5 millimetres, from grassground, 875.5. Wilhelm, Der Boden und das Wasser, p. 57; Krecke, Het Klimaat van Nederland, ii., p. 111.
The quadrangles were twelve in number, divided from each other by four longitudinal and two transverse untatued lines, 6 millimetres broad, two of the longitudinal lines running down each side of the front of the leg, and two down each side of the calf, approximately equidistant; the forearm was tatued in the same style. This manner of tatu is obsolete now, but Dr.
The French opticians' rule of doubling the number of millimetres contained in the aperture of an instrument to find the highest magnifying power usually applicable to it, would give 3,600 as the maximum for the leviathan of Birr Castle; but in a climate like that of Ireland the occasions must be rare when even that limit can be reached.
With a grater, however, I scrape the outside of another nest so as to reduce the depth of the cavities to some ten millimetres. Of the fourteen cavities in the nests, I leave two intact, measuring fifteen millimetres in depth. The twelve cavities whose depth had been reduced all received males; the two cavities left untouched received females.
A flight of a few millimetres in a gas suffices to reduce their number by one-half. They have great ionizing power. The beta rays are on all points similar to the cathode rays; they are, as M. and Madame Curie have shown, negatively charged, and the charge they carry is always the same.
My apparatus of reeds, fixed against the walls of the garden, supplied me with a remarkable nest of the Horned Osmia. The nest is established in a bit of reed 11 millimetres wide inside. The laying therefore seems here to be complete. Well, this laying is arranged in a most singular fashion.
It took far longer than one would have thought. The wood had a good many knots, and he often had to work against the grain; the planing was therefore rather difficult and slow. He planed a good deal off them, but could "guarantee them," as he said. Their sides were not many millimetres thick; to strengthen them in the joints, corners of aluminium were put on.
Six of these are arranged in two lateral rows; the others are between the two rows. In each row of three nipples, the one in the middle is the largest; it no doubt corresponds with the mandibles. The length of this organism varies greatly, fluctuating between 8 and 15 millimetres. Its width is from 3 to 4 millimetres.
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. I thought it advisable to have these short tubes, as the Osmia is thus compelled to select different lodgings, each of them being insufficient in itself to accommodate the total laying.
The Scolia's egg is in no way exceptional in shape. It is white, cylindrical, straight and about four millimetres long by one millimetre thick. I watch the hatching. The grub, still wearing upon its hinder parts the delicate pellicle which it has just shed, is fixed to the spot to which the egg itself adhered by its cephalic extremity.
Word Of The Day