The Popular Science Monthly, Volume 65McClure, Phillips and Company, 1904 - Science |
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Page 9
... regions of the promi- nence spectrum , to discover other lines better fitted for future experi- ments . In the extreme violet region , in the midst of two broad dark bands which form the most striking feature of the solar spectrum , two ...
... regions of the promi- nence spectrum , to discover other lines better fitted for future experi- ments . In the extreme violet region , in the midst of two broad dark bands which form the most striking feature of the solar spectrum , two ...
Page 11
... regions of calcium vapor , luminous enough to render their existence evident through the pro- duction of bright H and K lines on the solar disk ( Fig . 1 , b and c ) . Some of these calcium regions had indeed been known to exist through ...
... regions of calcium vapor , luminous enough to render their existence evident through the pro- duction of bright H and K lines on the solar disk ( Fig . 1 , b and c ) . Some of these calcium regions had indeed been known to exist through ...
Page 12
... regions , which are known as faculæ . The calcium regions above referred to are usually associ- ated with the faculæ , but they lie above them , and they give no trace of their existence on ordinary photographs , like the one in Fig . 4 ...
... regions , which are known as faculæ . The calcium regions above referred to are usually associ- ated with the faculæ , but they lie above them , and they give no trace of their existence on ordinary photographs , like the one in Fig . 4 ...
Page 16
... regions at which convection currents , proceeding from within the sun , bring up highly heated vapors to a height ... region the faculæ may be seen visually . At times they may be traced to considerable distances from the sun's limb ...
... regions at which convection currents , proceeding from within the sun , bring up highly heated vapors to a height ... region the faculæ may be seen visually . At times they may be traced to considerable distances from the sun's limb ...
Page 17
... region of much lower pressure , and during the ascent it might be expected to expand and therefore to become less dense . Now we know from experiments in the laboratory that dense calcium vapor produces very broad spectral bands , and ...
... region of much lower pressure , and during the ascent it might be expected to expand and therefore to become less dense . Now we know from experiments in the laboratory that dense calcium vapor produces very broad spectral bands , and ...
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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...