The Chemical Engineer: A Monthly Journal of Practical, Applied and Analytical Chemistry, Volúmenes7-8


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Página 207 - I have but one lamp by which my feet are guided, and that is the lamp of experience. I know of no way of judging of the future but by the past.
Página 246 - Three for one year, three for two years, and three for three years, and members shall be eligible for reappointment.
Página 246 - The duties of all officers shall be such as usually pertain to their offices, or may be delegated to them by the Council or the Institute ; and the Council may in its discretion require bonds to be given by the Treasurer.
Página 214 - Evaporation and Temperature: All evaporations and dryings shall be conducted in the form of apparatus known as the "Combined Evaporator and Dryer," at a temperature not less than 98° C.
Página 226 - The tests in the gas producer have shown that many fuels of so low grade as to be practically valueless for steaming purposes, such as slack coal, bone coal and lignite, may be economically converted into producer gas and may thus generate sufficient power to render them of high commercial value.
Página 201 - The oil used shall be the best obtainable grade of coal-tar creosote ; that is, it shall be a pure product obtained from coal gas tar or coke oven tar and shall be free from any tar...
Página 212 - At least 400 cc of the first portions of extractive solution should be removed and not subjected to further heating. A thin layer of cotton must be used in order to prevent fine material passing over.
Página 212 - Sample must be dried at a temperature not exceeding 60° and then ground to such a degree of fineness that the entire sample will pass through a sieve of 20 meshes to the inch (linear). 3. Amount of Sample and Proportion of Water for Extraction. — For fresh materials the amount of sample and proportion of water for extraction should be such as to give...
Página 81 - It is important that the above information does not establish a higher standard than can be actually maintained under the terms of the contract; and in this connection it should be noted that the small samples taken from the mine are invariably of higher quality than the coal actually delivered therefrom. It is evident, therefore, that it will be to the best interests of the contractor to furnish a correct description with average values of the coal offered, as a failure to maintain...
Página 41 - ... month, said delivered value in each case being obtained as follows: Multiply the number of British thermal units delivered per pound of dry coal by the per cent of moisture delivered (expressed in decimals), subtract the product so found from the number of British thermal units delivered per pound...

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