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Updated: May 11, 2025
Calculations based on the time of arrival of this disturbance at widely separated points show that it proceeded with the velocity of sound from a point situated probably in Northern Labrador. The maximum rise of pressure recorded was registered at Halifax, the self-recording barographs showing that the pressure rose over six centimetres in less than five minutes.
In a little chamber about a foot square half-way to the apex, and extending to the center of the pile, he placed a self-recording spirit thermometer, a small tin cylinder containing records of the expedition, and then sealed up the aperture with a closely fitting stone. The cache was surmounted with a small American flag made by Mrs.
Simpson, master of his craft, untiringly attentive to the working of his numerous self-recording instruments, observing all changes with scientific acumen, doing the work of two observers at least and yet ever seeking to correlate an expanded scope. So the current meteorological and magnetic observations are taken as never before by Polar expeditions.
Later went into our carbide expenditure with Day: am glad to find it sufficient for two years, but am not making this generally known as there are few things in which economy is less studied than light if regulations allow of waste. Electrical Instruments For measuring the ordinary potential gradient we have two self-recording quadrant electrometers.
Simpson was to have charge of the self-recording magnetic instruments ashore at the main base. Study of ice structure and glaciation was undertaken by Mr. C.S. Wright, who was also assistant physicist. The magnetic work of the ship was entrusted to Lieut. Harry Pennell, R.N., an officer of more than ordinary scientific attainments and a distinguished navigator. Lieut.
As we have noticed, Morse took particular pride in the fact that the receiving apparatus in his telegraph was self-recording, and considered this as one of the most important parts of his system.
The waves of the air attendant on the explosion ran round the earth at least once, as was distinctly indicated by the self-recording barometers; it is possible, indeed, that, crossing each other in their east and west courses, these atmospheric tides twice girdled the sphere.
That portion of the stables where the animals are kept, and which accommodates about one hundred and fifteen head, is thoroughly equipped with the most approved methods for the care of the stock, including a complete system-for drainage and cleanliness; vermin proof, zinc-lined storage bins, and automatic self-recording feeding apparatus.
First of all a visit was paid to Simpson's Corner, where numerous shelves laden with a profusion of self-recording instruments, electric batteries and switchboards were to be seen, and the tickings of many clocks, the gentle whir of a motor and occasionally the trembling note of an electric bell could be heard.
Went round the bergs after lunch on ski splendid surface and quite a good light. We are now getting good records with the tide gauge after a great deal of trouble. Day has given much of his time to the matter, and after a good deal of discussion has pretty well mastered the principles. We brought a self-recording instrument from New Zealand, but this was passed over to Campbell.
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