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absorption adiabatic alcohol amount apparatus apparent expansion atmospheric pressure body boiler boiling boiling-point Boyle's law bulb called calorimeter carbon carbonic acid Centigrade centimetres coefficient of expansion column compressed condenser constant pressure containing cooling cubic centimetres cylinder degree denote density dew-point difference of temperature diffusivity ebullition effect employed energy engine equal equation ether evaporation experiment external Fahrenheit fly-wheel force freezing freezing-point gases given glass globe grammes Hence hygrometer increase indicated instrument lamp-black latent heat liquid lower mass maximum means measured melting melting-point mercurial thermometer mercury metal mixture motion observed obtained pass perature piston placed plate portion produced proportional quantity of heat radiation raised ratio rays Regnault relative density reservoir saturated scale slide-valve solid source of heat specific heat steam steam-engine substance sulphuric acid suppose surface tempera thermal capacity thermometer tion tube ture vapour velocity vessel weight zero
Page 530 - There is a river in the ocean. In the severest droughts it never fails, and in the mightiest floods it never overflows. Its banks and its bottom are of cold water, while its current is of warm. The Gulf of Mexico is its fountain, and its mouth is in the Arctic Seas. It is the Gulf Stream.
Page 543 - Extract from Preface. SIGHT : An Exposition of the Principles of Monocular and Binocular Vision. By JOSEPH LE CONTE, LL. D., author of "Elements of Geology"; "Religion and Science"; and Professor of Geology and Natural History in the University of California.
Page 530 - ... bottom are of cold water, while its current is of warm; the Gulf of Mexico is its fountain, and its mouth is in the Arctic Seas. It is the Gulf Stream. There is in the world no other such majestic flow of waters. Its current is more rapid than the Mississippi or the Amazon, and its volume more than a thousand times greater.
Page 334 - A glacier is an imperfect fluid, or a viscous body which is urged down slopes of a certain inclination by the mutual pressure of its parts.
Page 530 - Often onehalf of the vessel may be perceived floating in Gulf Stream water, while the other half is in common water of the sea — so sharp is the line, and such the want of affinity between those waters, and such, too, the reluctance, so to speak, on the part of those of the Gulf Stream to mingle with the littoral waters of the sea.
Page 389 - Humidity. — The condition of the air as regards moisture involves two distinct elements: (1) the amount of vapour present in the air, and (2) the ratio of this to the amount which would saturate the air at the actual temperature. It is upon the second of these elements that our sensations of dryness and moisture chiefly depend, and it is this element which meteorologists have agreed to denote by the term humidity; or, as it is sometimes called, relative humidity. It...
Page 485 - One horse would have been equal to the work performed, though two were actually employed. Heat may thus be produced merely by the strength of a horse, and, in a case of necessity, this heat might be used in cooking victuals. But no circumstances could be imagined in which this method of procuring heat would be advantageous ; for more heat might be obtained by using the fodder necessary for the support of a horse as fuel.
Page 544 - Bearings upon the Antiquity of Man. By G. FREDERICK WRIGHT, DD, LL. D. With 152 Maps and Illustrations. Third edition, containing Appendix on the "Probable Cause of Glaciation," by WARREN UPHAM, FGSA, and Supplementary Notes.
Page 352 - ... modified as to be unable at any stage of the process to overcome alone the resistance of the fluid to change of volume. The properties described in this communication, as exhibited by carbonic acid, are not peculiar to it, but are generally true of all bodies which can be obtained as gases and liquids.
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Biblioteca scientifica Roberto Mantovani