Mechanics' Magazine, المجلد 41

الغلاف الأمامي
Knight & Lacey, 1844
 

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الصفحة 469 - Master will do more Work than both his Hands; and again, Want of Care does us more Damage than Want of Knowledge; and again, Not to oversee Workmen, is to leave them your Purse open. Trusting too much to others...
الصفحة 285 - Sub-Excavating, Timbering, and the Construction of the Brickwork of Tunnels, with the amount of Labour required for, and the Cost of, the various portions of the work. By FREDERICK W.
الصفحة 462 - Now know ye, that, in compliance with the said proviso, I, the said William Francis Fernihough, do hereby declare, that the nature of my said invention, and the manner in which...
الصفحة 434 - Ammonia, too, is capable of undergoing such a multitude of transformations, when in contact with other bodies, that in this respect it is not inferior to water, which possesses the same property in an eminent degree. It possesses properties which we do not find in any other compound of nitrogen ; when pure, it is extremely soluble in water ; it forms soluble compounds with all the acids ; and when in contact with certain other substances, it completely resigns its character as an alkali, and is capable...
الصفحة 397 - What we claim as our invention, and desire to secure...
الصفحة 11 - I have seen the water run like a constant fountain stream forty feet high ; one vessel of water rarefied by fire driveth up forty of cold water. And a man that tends the work is but to turn two cocks, that one vessel of water being consumed, another begins to force and re-fill with cold water, and so successively, the fire being tended and kept constant, which the self-same person may likewise abundantly perform in the interim between the necessity of turning the said cocks.
الصفحة 78 - The diving-boat, in the construction of which he is now employed, will be capacious enough to contain eight men, and provision enough for twenty days, and will be of sufficient strength and power to enable him to plunge one hundred feet under water, if necessary. He has contrived a reservoir of air, which will enable eight men to remain under water eight hours. When the boat is above water it has two sails, and looks just like a common boat ; when she is to dive, the mast and sails are struck.
الصفحة 410 - ... which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it...
الصفحة 320 - A table spoonful of pulverised alum sprinkled into a hogshead of water (the water stirred at the time) will, after the lapse of a few hours, by precipitating to the bottom the impure particles, so purify it that it will be found to possess nearly all the freshness and clearness of the finest spring water. A pailful, containing four gallons, may be purified by a single teaspoonful.
الصفحة 103 - Office, against the extension. (3) If her Majesty shall be pleased to refer any such petition to the Judicial Committee of the Privy Council, the said Committee shall proceed to consider the same, and the petitioner and any person who has entered a caveat shall be entitled to be heard by -himself or by counsel on the petition.

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