Chemical Essays, المجلد 4T. Evans, and sold, 1788 |
عبارات ومصطلحات مألوفة
acid Adrumetum alfo arfenic atmoſphere becauſe black jack Boyle brafs braſs cadmia caft calamine calcareous calcareous earth calcined called cinnabar colour compofed compofition confifts contained copper veffels cubic foot degree of heat Derbyshire different forts diftilled Engliſh eſtabliſhed eſteemed experiment expofed faid falt fame fays feems feen feparated fhould fide filver fimilar fince fire firſt fixed air flate Flintshire fmall folution fome foon fpeaking fpecula fquare ftance ftate fteel ftill ftone fubject fuch fufficient fufion fulphur fuppofing furface glafs glaſs gold grains Hift increaſe iron itſelf laft lead lefs lofe loft manufactures Marggraf melted mercury metallic fubftance mineral mixed mixture moſt muſt obfervation orichalcum ounces perfon pewter philofophers plates Pliny poffible pounds pounds weight prefent publiſhed pure tin purpoſe quantity quickfilver reaſon refpect reſembling ſeen ſpeaking ſtate Strabo ſubſtance tained thefe theſe thickneſs thoſe tion Tranf uſed vafe water into earth Weftmoreland zinc
مقاطع مشهورة
الصفحة iii - I have destroyed all my chemical manuscripts. A prospect of returning health might have persuaded me to pursue this delightful science ; but I have now certainly done with it for ever — at least I have taken the most effectual step I could to wean myself from an attachment to it : for with the holy zeal of the idolaters of old, who had been addicted to curious arts — I have burned my books.
الصفحة 155 - The officers appointed by the Duke of Cornwall assay it, by taking off a piece of one of the under corners of the block, partly by cutting, and partly by breaking; and if well purified, they...
الصفحة 41 - ... earth, which is driven off by the violence of the fire during the combustion, or remains surrounding the burning zinc like a piece of cotton wool. This combustion of zinc is as striking an experiment as any in chemistry, and it is in the power of any person to make it, by sprinkling filings of zinc on a pan of burning charcoal, or on a poker, or other piece of Iron heated to a white heat ; it is this property which renders fine filings of zinc of great use in fire-works.
الصفحة 237 - ... placed on the glass, and in a little time the quicksilvered tin-foil adheres so firmly to the glass, that the weights may be removed without any danger of its falling off. The glass thus coated is a common Bookingglass.
الصفحة 172 - Zinc was- long ago recommended" for the tinning of copper vefiels> in preference both to the mixture of tirf and lead, and to pure tin * : and zinc certainly has the advantage of being harder than tin, and of bearing a greater degree of heat before it will be melted from the furface of the copper ; fo that on both thefe accounts it would, when applied on the furface of copper, laft longer than tin ; juft as tin, for the fame reafons, lafts longer than a mixture of tin and lead.
الصفحة 183 - They, moreover, applied filver upon copper, in the fame way in which they applied tin upon it * ; and they ufed This defcription feems to be expreffive of the manner of tinning, by putting the copper into melted tin, as is pradifed in the tinning of iron plates.
الصفحة 195 - ... pincers feemed to have been penetrated through its whole fubftance by the tin ; it was of a white colour, and had preferved its malleability. It is ufual to cover iron ftirrups, buckles, and bridle bits, with a coat of tin, by dipping them, after they are made...
الصفحة 130 - And accordingly we find, that this mixture is not only more brittle, more hard, and more fonorous, than either copper or tin ; but it is more denfe alfo, than either of .them; a cubic foot of it weighing, not only more than a cubic foot of tin, but than a cubic foot of copper itfelf. Pot-metal is made of copper and lead, the lead being one fourth or one fifth the weight of the copper. In Pliny's...
الصفحة 50 - Nuremberg, is, when drawn into wire, said to be far preferable to any made in England for the strings of musical instruments.
الصفحة 309 - ... quantity which had been spread over its surface; for it was the quantity which had been imbibed by the slate, the surface of which was equal to that of the tile ; the tile was left to dry in a room heated to 60 degrees, and it did not lose all the water it had imbibed in less than six days.