School Science and Mathematics, Τόμος 7Smith & Turton, 1907 |
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Σελίδα 1
... necessary treat the solution with HS to remove the metals of the first two groups . Filter , boil to expel HS gas from the filtrate and add a slight excess of Na : CO3 . Boil , filter while hot , wash and reserve the precipitate which ...
... necessary treat the solution with HS to remove the metals of the first two groups . Filter , boil to expel HS gas from the filtrate and add a slight excess of Na : CO3 . Boil , filter while hot , wash and reserve the precipitate which ...
Σελίδα 5
... necessary to test for it again under Group V. B. 1. F. Test a portion of the residue which was insoluble in acetic acid as follows : Cover a piece of window glass or a small watch glass with a thin coating of wax and when the wax is ...
... necessary to test for it again under Group V. B. 1. F. Test a portion of the residue which was insoluble in acetic acid as follows : Cover a piece of window glass or a small watch glass with a thin coating of wax and when the wax is ...
Σελίδα 9
... necessary to adopt .001 of an inch as a definite unit . Even this unit is being subdivided , and , in shop parlance , is called a " half thousandth " or " quarter thousandth . " ( Attention is called to .I of a milli- meter as a far ...
... necessary to adopt .001 of an inch as a definite unit . Even this unit is being subdivided , and , in shop parlance , is called a " half thousandth " or " quarter thousandth . " ( Attention is called to .I of a milli- meter as a far ...
Σελίδα 34
... necessary current . Obviously the glowers and the ballasts must be adapted to the voltage on which they are to operate . These parts of the lamp already described can be had neatly mounted in lamp bodies in which the initial heating of ...
... necessary current . Obviously the glowers and the ballasts must be adapted to the voltage on which they are to operate . These parts of the lamp already described can be had neatly mounted in lamp bodies in which the initial heating of ...
Σελίδα 45
... necessary , and throw in a handful of cotton sat- urated with 3 or 4 teaspoonfuls of chloroform ; cover tightly and hold the lid down while the animal is passing through the stage of intoxication . The cat will be dead in about 15 ...
... necessary , and throw in a handful of cotton sat- urated with 3 or 4 teaspoonfuls of chloroform ; cover tightly and hold the lid down while the animal is passing through the stage of intoxication . The cat will be dead in about 15 ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acetic acid acid algebra angle apparatus applied arithmetic atomic atomic weights Biology boiling cent chemistry Chicago color committee course discussion Earth Science elementary elementary algebra Englewood High School equation exercises experiments fact field geography geometry give given guncotton hydrogen hypsometer I. L. Winckler idea illustrated interest knowledge laboratory large number laws lecture long tons Mass Mathematics Mathematics Teachers means mental method metric system mind nature negative number Normal School paper physiology plane plant practical preparation present principles problems Professor pupil quantity questions Roxbury Latin School SCHOOL SCIENCE SCIENCE AND MATHEMATICS scientific secondary school short tons Shortridge High School solution student suggested taught Teachers of Mathematics teaching text-book theorems theory things tion triangle trigonometry tube University Volvox weight
Δημοφιλή αποσπάσματα
Σελίδα 322 - Square Measure 144 square inches = 1 square foot 9 square feet = 1 square yard 30£...
Σελίδα 71 - The following resolution was passed : Resolved, That it is the sense of the...
Σελίδα 341 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Σελίδα 286 - School full credit is given by all the other normal schools of the State and in addition by the Teacher's College of Columbia University and the School of Education of the University of Illinois. When institutions of this high character accept class-extension work, it will evidently be perfectly safe for other institutions to do likewise. EXTENSION SCHOLARSHIPS. Scholarships and prizes for extension students have usually taken the form of tuition or payment of some part of the...
Σελίδα 578 - science," because of my conviction that, for long to come if not for ever, it will be the remorseless enemy of mankind. I see it destroying all simplicity and gentleness of life, all the beauty of the world ; I see it restoring barbarism under...
Σελίδα 242 - ... the American Physical Society, the American Psychological Association, the American Physiological Society, the American Society of Vertebrate Paleontologists, the American Chemical Society, the American Society of Zoologists, the American Nature-Study Society, the American Mathematical Society, the American Federation of Teachers of the Mathematical and the Natural Sciences, the American Institute of Electrical Engineers, the American Alpine Club, the Association of American Geographers, the...
Σελίδα 421 - How far up the incline will it move before coming to rest ? 5. How may the weight of a stick be found by using a single weight, an edge upon which to balance the stick, and a meter rule ? Explain your method. Give a diagram. 6. Approximately how deep must a bottle, neck downwards, be sunk in water in order to reduce contained air to half its initial volume ? What law of gases applies to the case ? C — Answer two questions in this group.
Σελίδα 328 - ... it is better to present a few topics in such a manner that they are powerful examples of the method by which science obtains its results, than to try to teach a large number of more or less scattered facts and theories in such a way that they can only be committed to memory.
Σελίδα 106 - Two triangles are equal if two sides and the included angle of one are equal respectively to two sides and the included angle of the other...
Σελίδα 242 - Bibliography of science teaching, compiled by a committee of the American federation of teachers of the mathematical and the natural sciences.