Annual Report, Объемы 41-421873 |
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Стр. 25
... pipes to suitably constructed forcing pumps , which are placed at the bottom of the mine . As these columns balance each other , the only loss in transmission is that due to the friction of the water in the pipes , which cannot exceed a ...
... pipes to suitably constructed forcing pumps , which are placed at the bottom of the mine . As these columns balance each other , the only loss in transmission is that due to the friction of the water in the pipes , which cannot exceed a ...
Стр. 43
... pipe is equal to the square of the velocity - the number of feet per second - divided by twice g , that is twice 32.2 , which is the accelerating force of gravity . V2 2g ' Though a simple contrivance of this kind will record the speed ...
... pipe is equal to the square of the velocity - the number of feet per second - divided by twice g , that is twice 32.2 , which is the accelerating force of gravity . V2 2g ' Though a simple contrivance of this kind will record the speed ...
Стр. 57
... pipes . The condensation , however , which must inevitably take place in the pipes , no matter how perfectly felted , renders the latter method impracticable for great depths . The system of erecting the engine underground is open to ...
... pipes . The condensation , however , which must inevitably take place in the pipes , no matter how perfectly felted , renders the latter method impracticable for great depths . The system of erecting the engine underground is open to ...
Стр. 58
... pipes constantly full , and the pump - pistons in their proper positions . These difficulties have now been overcome . As the columns in the pressure pipes balance each other , the only loss of power in transmission is that due to the ...
... pipes constantly full , and the pump - pistons in their proper positions . These difficulties have now been overcome . As the columns in the pressure pipes balance each other , the only loss of power in transmission is that due to the ...
Стр. 59
... pipes , through which the motive force is trans- mitted , may be fixed against the sides of the shaft , where they occupy no useful space ; they may be placed at any angle , and , provided sharp bends are avoided , the direction may be ...
... pipes , through which the motive force is trans- mitted , may be fixed against the sides of the shaft , where they occupy no useful space ; they may be placed at any angle , and , provided sharp bends are avoided , the direction may be ...
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ADIT Alfred Fox apparatus Bodmin boiler Brea Hill bronze medal buddle Camborne Capt carbon Carn Brea Carn Brea Hill Chacewater coal Committee Condenser copper Cornish Cornwall Crofty crystals of felspar crystals of quartz cubic cylinder Dartmoor decomposed diameter DISTRICT ditto ditto ditto drawing elvan elvan course Exhibition Falmouth fathoms feet felspar felspathic Freeman Genn giants governor grained granite Grimspound Helston Illogan inches iron John judges killas Kynance Cove lode machine machinery Messrs mica miles miners mines Miss observations obtained patent Penryn Penzance pipe piston Plate Polytechnic porphyritic pressure prize produced pumping engine quantity quarried quartz quartzo-felspathic Redruth rock Rogers Royal sand schorl shaft shewn Society South Carn specimens speed stamps steam stone stuff surface TABLE Tregelles Truro tube valve velocity W. P. Dymond weight West Wheal Basset
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Стр. 24 - Allow me to thank you for the kind way in which you have listened to the remarks I have made, and to assure you how deeply I am with you on this occasion, both heart and soul.
Стр. 211 - Every person who shall wilfully admix, and every person who shall order any other person or persons to admix, with any article of food or drink, any injurious or poisonous ingredient or material to adulterate the same for sale...
Стр. 20 - Under what is technically called the long-wall system of working the coal, a difference of about 7° appears to exist between the temperature of the air and that of the strata at the working faces, and this difference increases 4 per cent.
Стр. 56 - ... and there we saw the giants, the sons of Anak, which come of the giants ; and we were in our own sight as grasshoppers, and so were we in their sight.
Стр. 211 - An act to amend the law for the Prevention of Adulteration of Food and Drink, and of Drugs.
Стр. 181 - Photographic copies in bichromated gelatine, from delicate line engravings, have been thus faithfully reproduced on glass. In photographic pictures in gelatine, taken from nature, the lights and shadows produce films of gelatine of different degrees of thickness. A carefully regulated sand-blast will act upon the glass beneath these films more or less powerfully in proportion to the thickness of the films, and the half-tones or gradations of light and shade are thus produced on the glass. If we apply...