Transactions of the Royal Scottish Society of Arts, Volumen4Neill & Company, 1856 Vol. 1- includes the proceedings of the society. |
Dentro del libro
Resultados 1-5 de 60
Página 1
... rays in the required direction with the least possible loss from absorption or irregular scattering . It is important to recollect these views when considering the application of optical principles to the illumi- nation of lighthouses ...
... rays in the required direction with the least possible loss from absorption or irregular scattering . It is important to recollect these views when considering the application of optical principles to the illumi- nation of lighthouses ...
Página 2
... rays in every plane , is the proper and indeed the only means by which the conditions postulated can be fulfilled , and it is also evident that such an arrange- ment fulfils those conditions perfectly . Such a case as that supposed ...
... rays in every plane , is the proper and indeed the only means by which the conditions postulated can be fulfilled , and it is also evident that such an arrange- ment fulfils those conditions perfectly . Such a case as that supposed ...
Página 3
... rays falling upon the first or inner side of the zone are refracted , and pass on to the second or upper side , where they suffer total reflection and then emerge after a second refraction at the third or outer side of the zone . The ...
... rays falling upon the first or inner side of the zone are refracted , and pass on to the second or upper side , where they suffer total reflection and then emerge after a second refraction at the third or outer side of the zone . The ...
Página 4
... rays . If a radiant point be placed in the focus of a paraboloidal re- flector , a , fig . 1 , Plate I. , each diverging ray which falls upon its surface will , as is well known , be thrown forward parallel to the axis , for a tangent ...
... rays . If a radiant point be placed in the focus of a paraboloidal re- flector , a , fig . 1 , Plate I. , each diverging ray which falls upon its surface will , as is well known , be thrown forward parallel to the axis , for a tangent ...
Página 5
... rays which pass above the lenses ; while below the lenses there is added a series of totally reflecting prisms , p ... rays into as many portions as there are lenses in the frame , in Fresnel's revolv- ing dioptric apparatus , together ...
... rays which pass above the lenses ; while below the lenses there is added a series of totally reflecting prisms , p ... rays into as many portions as there are lenses in the frame , in Fresnel's revolv- ing dioptric apparatus , together ...
Contenido
1 | |
20 | |
34 | |
61 | |
69 | |
83 | |
94 | |
113 | |
299 | |
306 | |
313 | |
345 | |
356 | |
364 | |
394 | |
401 | |
119 | |
130 | |
138 | |
168 | |
177 | |
183 | |
191 | |
197 | |
238 | |
250 | |
267 | |
276 | |
292 | |
413 | |
420 | |
429 | |
431 | |
449 | |
51 | |
73 | |
119 | |
204 | |
205 | |
219 | |
265 | |
Otras ediciones - Ver todas
Términos y frases comunes
Alex Alexander angle apparatus applied arch architect axis ball caisson canal carriage centre Chair coal colour colour-blind Committee constructed Convener David DAVID LANDALE decimal Description diameter disc Donations were laid Drawings Edinburgh effect engineer farthings feet fixed following Donations George George Wilson Glasgow glass Haarlem harbour holophotal improvement inches instrument iron James JAMES TOD John KEITH PRIZE Leith light lighthouse London magnet means method Minie ball Minutes of last motion paper placed plane Plate present President Prizes Professor pumps Railway Railway Signal rays read and approved Read and exhibited Report revolving river River Clyde Robert rotation Royal Scottish Society Sang screw Session side signal Society of Arts Society's Silver Medal spandril steam Stevenson Stornoway Street surface Thanks voted theodolite Thomas Thomas Grainger Thomas Stevenson tion tons Torbane vessels weight wheel William WILLIAM SWAN Wilson
Pasajes populares
Página 234 - Wilson. — A MEMOIR OF GEORGE WILSON, MD, FRSE, Regius Professor of Technology in the University of Edinburgh. By his SISTER. New Edition. Crown 8vo. 6s. "An exquisite and touching portrait of a rare and beautiful spirit.
Página 117 - Then let us pray that come it may, As come it will for a' that ; That sense and worth, o'er a' the earth, May bear the gree, and a' that. For a
Página 83 - Her home is on the deep. With thunders from her native oak She quells the floods below, As they roar on the shore, When the stormy winds do blow...
Página 388 - In this situation the green light only will be visible to each, the screens preventing the red light from being seen. They are therefore passing to starboard of each other, which is rulable in this situation, each pilot having previously signified his intention by two blasts of the whistle.
Página 4 - Comet,' between Glasgow, Greenock, and Helensburgh, for passengers only. The subscriber having, at much expense, fitted up a handsome vessel to ply upon the River Clyde, between Glasgow and Greenock — to sail by the power of wind, air, and steam...
Página 5 - The power of propelling boats by steam is now fully proved. The morning I left New York, there were not perhaps thirty persons in the city who believed that the boat would ever move one mile an hour, or be of the least utility ; and while we were putting off from the wharf, which was crowded with spectators, I heard a number of sarcastic remarks. This is the way in which ignorant men compliment what they call philosophers and projectors.
Página 5 - It will give a cheap and quick conveyance to the merchandise on the Mississippi, Missouri, and other great rivers, which are now laying open their treasures to the enterprise of our countrymen ; and although the prospect of personal emolument has been some inducement to me, yet I feel infinitely more pleasure in reflecting on the immense advantage that my country will derive from the invention.
Página 5 - My steam-boat voyage, to Albany and back, has turned out rather more favourable than I had calculated. The distance from New- York to Albany is one hundred and fifty miles: I ran it up in thirty-two hours, and down in thirty. I had a light breeze against me the whole way, both going and coming, and the voyage has been performed wholly by the power of the steam-engine.
Página 148 - HOLLAND. A COUNTRY that draws fifty foot of water, In which men live as in the hold of Nature, And when the sea does in upon them break, And drowns a province, does but spring a leak : That...
Página 4 - Soon shall thy arm, nnconquered Steam ! afar Drag the slow barge, or drive the rapid car ; Or, on wide-waving wings expanded, bear The flying chariot through the fields of air.