Science, Opseg 22John Michels (Journalist) American Association for the Advancement of Science, 1893 |
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Stranica
... METHOD OF PROTECTING BUILDINGS FROM LIGHTNING . SPARE THE ROD AND SPOIL THE HOUSE ! Lightning Destroys . Shall it be Your House or a Pound of Copper ? PROTECTION FROM LIGHTNING . What is the Problem ? IN seeking a means of protection ...
... METHOD OF PROTECTING BUILDINGS FROM LIGHTNING . SPARE THE ROD AND SPOIL THE HOUSE ! Lightning Destroys . Shall it be Your House or a Pound of Copper ? PROTECTION FROM LIGHTNING . What is the Problem ? IN seeking a means of protection ...
Stranica 1
... method has been devised by Wislecenus ' by which the acid is made entirely from inorganic substances . This is done by first treating molten metallic sodium ( or potassium ) with dry ammonia gas , and then treating the sodium amide thus ...
... method has been devised by Wislecenus ' by which the acid is made entirely from inorganic substances . This is done by first treating molten metallic sodium ( or potassium ) with dry ammonia gas , and then treating the sodium amide thus ...
Stranica 8
... method of teaching children is that which Mr. Waldo quotes as employed by his former teacher . And there are many books which occur at once to the mind of any teacher as valuable aids to the parent who wishes to work with his child . I ...
... method of teaching children is that which Mr. Waldo quotes as employed by his former teacher . And there are many books which occur at once to the mind of any teacher as valuable aids to the parent who wishes to work with his child . I ...
Stranica 9
... method so far ) give values between 25 and 27 days , depending on the solar latitude of the spot ; yet , the addi- tion of a " few hours " can introduce a " drift which becomes every- where apparent , " when 24 days is left out of the ...
... method so far ) give values between 25 and 27 days , depending on the solar latitude of the spot ; yet , the addi- tion of a " few hours " can introduce a " drift which becomes every- where apparent , " when 24 days is left out of the ...
Stranica 10
... method is , of course , to compound the percentages representing the relative attractiveness of each color at each distance . This gives the values in Table I .: Blue , .78 ; red , .75 ; white , .78 ; green , .68 ; brown , .43 ; and in ...
... method is , of course , to compound the percentages representing the relative attractiveness of each color at each distance . This gives the values in Table I .: Blue , .78 ; red , .75 ; white , .78 ; green , .68 ; brown , .43 ; and in ...
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