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Place the bright flame of a spermaceti candle before a black object in the night; look steadily at it for a short time, till it is observed to become somewhat paler; and on closing the eyes, and covering them carefully, but not so as to compress them, the image of the blazing candle will continue distinctly to be visible. Look steadily, for a short time, at a window in a dark day, as in Exp. 2.
Head densely clothed with long whitish hairs; thorax and abdomen with black hairs; wings hyaline, the nervures and nervules brown, with a few black scales: base of the anterior and abdominal fold of the posterior more or less covered with black hairs; antennae and legs fuscous brown. Exp. 10 12 lines.
Another observer, Paul Marchal, took up this question afresh, and the results which he obtained seemed to indicate an instinct much less firm than earlier studies tended to show. "Histoire des Cerceris," Ann. Sc. Nat., ii. Série, t. xv., 1841, pp. 353-370. Arch. de Zool. exp., 1887. Genera less skilful in the art of paralysing victims.
printed in gilt which gradually wore off as time went on. Inside on the fly-leaf I had written "IF FOUND, please return to Sgt. J. HARGRAVE, 32819, R.A.M.C. 32nd Field Ambulance, X Division, Med. Exp. Force." And on the opposite page I wrote "IN CASE OF DEATH please post as soon as possible to GORDON HARGRAVE, Cinderbarrow Cottage, Levens, Westmorland."
In these cases there is no question of any influence of the foetus, and experiment has shown that if the ovaries are removed before puberty, the milk glands nor the uterus undergo the normal development and menstruation does not occur. Journ. Exp.
"Up top the hill," he proceeded, clinchingly. He stretched out a huge hand. "How you?" he inquired with a friendly grin. "I want to know," I said distinctly, "what you've got to say for yourself after letting our affair with the professor become public property?" He paused awhile in thought. "Dear sir," he said at last, as if he were dictating a letter, "dear sir, I owe you ex exp "
It is of calico stretched on a light wooden frame, and you will be able to judge if it swings equally on each side of the post which supports it. The irregularity of its movement shows that it is too light, so we shall add, by way of swing bar, a bar of round iron one and a quarter inch thick. Exp. 3.
In 1838 he expresses himself thus: 'The word current is so expressive in common language that when applied in the consideration of electrical phenomena, we can hardly divest it sufficiently of its meaning, or prevent our minds from being prejudiced by it. Exp. Resear., vol. i. p. 515. This conclusion needs qualification. Faraday overlooked the part played by ozone.
This experiment requires a little practice to make it succeed well; since, if the eyes are fatigued by looking too long on the window, or the day be too bright, the luminous parts of the window will appear dark in the spectrum, and the dark parts of the frame-work will appear luminous, as in Exp. 2. Sect.
In exp. d. the colours being the reverse of each other, the scattered rays from the exterior object falling on the central parts of the eye, and there exciting their direct spectrum, at the same time that the retina was excited into a reverse spectrum by the central object, and this direct and reverse spectrum being of similar colour, the superior brilliancy of this spectrum was produced.
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