The Popular Science Monthly, Volume 65McClure, Phillips and Company, 1904 - Science |
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Page 7
... produce such an effect it is only necessary to cause the solar image to move at a uniform rate across the first slit of the spectroscope and then , with the aid of a second slit , which takes the place of the eye- piece of the ...
... produce such an effect it is only necessary to cause the solar image to move at a uniform rate across the first slit of the spectroscope and then , with the aid of a second slit , which takes the place of the eye- piece of the ...
Page 17
... produces very broad spectral bands , and that as the density of the vapor is decreased these bands narrow down into fine sharp lines ( Fig . 8 ) . An examination of the solar spectrum will show that the II and K lines of calcium give ...
... produces very broad spectral bands , and that as the density of the vapor is decreased these bands narrow down into fine sharp lines ( Fig . 8 ) . An examination of the solar spectrum will show that the II and K lines of calcium give ...
Page 18
... produce a band of width sufficient to reach this position of the slit . No light from the rarer vapors above can enter the second slit under these circumstances , since they are incapable of producing a band of the necessary breadth ...
... produce a band of width sufficient to reach this position of the slit . No light from the rarer vapors above can enter the second slit under these circumstances , since they are incapable of producing a band of the necessary breadth ...
Page 22
... produced the greatest fall in temperature . It may ultimately appear that some other explanation must be adopted , especially since the hydrogen in the upper part of the chromosphere seems to be repre- sented by the smaller hydrogen ...
... produced the greatest fall in temperature . It may ultimately appear that some other explanation must be adopted , especially since the hydrogen in the upper part of the chromosphere seems to be repre- sented by the smaller hydrogen ...
Page 55
... produces no per- ceptible retardation of the planets show that they have missed the point of all analogies which is to furnish a mold in which we can cast our thought concerning the sequence of events . In like manner , a law in science ...
... produces no per- ceptible retardation of the planets show that they have missed the point of all analogies which is to furnish a mold in which we can cast our thought concerning the sequence of events . In like manner , a law in science ...
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academy American animals appear Association astronomical become body British cent century Chattanooga chemistry chromosphere Colorado College Copernicus curves Darwin decade dextrality disease doctrine earth eclipse electricity evolution existence experiments fact flocculi German hand Herder ical immigrants important increase insect interest investigation Italian knowledge known labor laboratory less limbs lines living Lord Monboddo Magyar mathematics matter Maupertuis means ment methods mountains movement mutability of species mutation nature observed organs Origin of Species original perhaps period phenomena philosophical photographs photosphere physical plants plateau political possible present president problem Professor question races region salt San Jose scale scale insect scientific seems solar species spectroheliograph spelling statolith teachers theory things thorium tion University vapor variations Vries women word-curves words writing yellow fever
Popular passages
Page 289 - And though all the winds of doctrine were let loose to play upon the earth, so Truth be in the field, we do injuriously by licensing and prohibiting to misdoubt her strength. Let her and Falsehood grapple; who ever knew Truth put to the worse in a free and open encounter?
Page 531 - I am labouring to lay the foundation, not of any sect or doctrine, but of human utility and power.
Page 258 - And every oblation of thy meat offering shalt thou season with salt; neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meat offering: with all thine offerings thou shalt offer salt.
Page 337 - It is a pity to see Lord Monboddo publish such notions as he has done: a man of sense, and of so much elegant learning. There would be little in a fool doing it; we should only laugh; but when a wise man does it we are sorry. Other people have strange notions; but they conceal them. If they have tails they hide them; but Monboddo is as jealous of his tail as a squirrel.
Page 211 - There can also be little doubt that the tendency to vary in the same manner has often been so strong that all the individuals of the same species have been similarly modified without the aid of any form of selection.
Page 532 - It can be read maliciously, but abstain. She says of Romance : ' The young who avoid that region escape the title of Fool at the cost of a celestial crown.
Page 506 - Natural science must ever regard knowledge as the product of irrational conditions, for in the last resort it knows no others. It must always regard knowledge as rational, or else science itself disappears. In addition, therefore, to the difficulty of extracting from experience beliefs which experience contradicts, we are confronted with the difficulty of harmonising the pedigree of our beliefs with their title to authority. The more successful we are in explaining their origin, the more doubt we...
Page 265 - Lazear also experimented on himself at the same time, but was not infected. Some days later, while in the yellow-fever ward, he was bitten by a mosquito and noted the fact carefully. He acquired the disease in its most terrible form and died a martyr to science and a true hero. No other fatality occurred among the brave men who, in the course of the experiments, willingly exposed themselves to the infection of the dreaded disease. A camp was especially constructed for the experiments about 4 miles...