[difficultproblem] Prime képek - GLIX Fotóügynökség

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Digital image of chemical structures and program codes appearing in the screen-stock-foto

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. The street railway review . ack so laid than here. The life of metalties is estimated by some prominent European engineersas about thirty years and that of wood as fifteen years. CAR FLOORS AND CLEANLINESS. HOW to keep car floors clean, is a question thathas puzzled many a manager. It is a difficultproblem to maintain a floor that will not beoffensive to the more refined patrons of the road andat the same time carry all classes of people. Here iswhat a few prominent street railway managers have tosay about it. E. R. Sherman, superintendent of the Eighth AvenueRailway Companj, of New York, sa-stock-foto

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. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ghting of Erecting Shops. Bv S. H. Knapp. The artificial ligliting of erecting shopsand machine shops so that the employeescan have light about equal to what theyget in the daytime, has been a difficultproblem. The use of heavy cranes hasmade it necessary to place most, if notall, the lights underneath the cranes. Inmany instances it has been impossible toplace lamps anywhere except on the sidewalls, although it is readily apparentthat with an arc or incandescent cluster shop of one of the la-stock-foto

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. The merman and the figure-head : a Christmas story . d certainly depend being toldto make himself invisible, which is a very difficultproblem, had made a mistake, used the wrongformula, and by accident transformed the wholeBoard of Examiners, who were not expecting anysuch thing, into cuttle-fishes. There was dread-ful confusion for a few minutes, for the studentcouldnt remember how to turn them back again,and as the spell could not be undone by any oneelse, the members of the board got all tangled uptogether, while the professor, in an awful temper,was trying to teach the young man the righ-stock-foto

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Electrical news and engineering . Pipe Line Kunning ])ai;ilkl wilh l-luiiu- which come down the canyon. It is intended to handlethese latter by booms in the pond above. The most difficultproblem in design was to obtain satisfactory sluices at aminimum cost which would satisfactorily permit of quickoperation and maintain a constant head during flood. Thelocation of the dam in the canyon so situated in referenceto the railway track and with no possibility of enlarge-ment of spillway area, without tunnelling on the south side,had to be met by construction of gates which could be liftedclear—were-stock-foto

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Canadian grocer July-December 1903 . yof Canadian flour. The agitation, how-ever, in favor of reciprocal legislation isentirely one sided. The Canadian peopleare sufficiently alive to their own inter-ests to appreciate the great opportuni-ties offering in the new avenues of ex-port now opening up, and with thegolden prospects now in sight, are notdisposed to listen to the overtures ofour milling friends of the United States.An American paper, in dealing with thismatter recently, says : It is a difficultproblem for us to solve. Canada is get-ting pretty foxy. She is doing herselfgood, and, at t-stock-foto

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. The railroad and engineering journal . as explained above. The bevels 1/■and /(■ / , and their curved intersections with the sides of thenut, are then drawn in fig. 142, in the same way as has beendescribed for drawing the head. As remarked above, the screw-thread of the bolt is not shownin the engravings. To represent it correctly is a difficultproblem, which will be explained ii» a future chapter. Gener- Vol. LXIV. No. g.] ENGINEERING JOURNAL. 419 ally, in making working drawings of bolts, it is sufficient toshow the bolt where it passes through the nut by dotted lines,as in fig. 142. i Fi-stock-foto

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A manual of operative surgery . described,and a division of the tibia just below itstuberosities (page 700). We have operated on a fair number ofthese cases, which present a most difficultproblem to the surgeon. We have obtainedthe best results from a true excision ofthe ankylosed joint. This does not leavean awkward angle, as the previously de-scribed methods do. The incision of thewedge is illustrated in Fig. 430, and theoperation is described on page 686. In these cases of extreme deformitygreat care must be taken in extending the limb after the operation. The tissues of the popliteal regio-stock-foto

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. The American journal of roentgenology, radium therapy and nuclear medicine . distribution of the thickening is irregular,as it frequently is, and the trunks to oneapical region only are involved, the twoconditions are quite difficult to distinguishby the inexperienced observer, and often Effects of Dust Inhalation upon the Lungs 135 almost impossible to differentiate by eventhe most experienced. A still more difficultproblem is the detection of a peribronchialtuberculosis in the presence of evidencesof the first stage of pneumoconiosis. Inseveral instances we have recorded ourplate readings-stock-foto

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. Gospel Messenger, The (1921). test thoughts of the worlds greatestpreachers, philosophers, historians, scientists, etc.,are here presented. Carefully classified and indexed. EXPOSITORS TREASURY OF CHILDRENS SERMONS, $625 Sir W. Robertson Nicoll, M. A., LL. D. A childrens Bible Commentary of nearly eight hun-dred pages. Each sermon is headed according tosubject, then follows the text and then the discussion—an easy solution of the ministers most difficultproblem. The Treasury is a splendid companion tothe Expositors Dictionary of Texts. Send all Suggests texts for childrens sermons and suppli-stock-foto

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$. Atlas and epitome of traumatic . Fig. 36.—United fracture of the right clavicle in a man thirty yearsof age. Seen from above and behind. There is an abundance of callus ;the inner fragment is displaced forward and upward, and overrides theouter fragment considerably. (Berliner Anat. Museum; after Gurlt.). causes that produce the displacement. It is well knownthat union of a broken clavicle without deformitywas formerly con-sidered one of thegreatest raritiesand a most difficultproblem to solve. We now havemeans at our dis-posal which enableus, even in theseverest cases, tosecure union in afa-stock-foto$

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Gospel Messenger, The (1922) . the greatest thoughts of the worlds greatestpreachers, philosophers, historians, scientists, etc.,are here presented. Carefully classified and indexed. EXPOSITORS TREASURY OF CHILDRENS SERMONS $6.25 Sir W. Robertson Nicoll, M. A., LL. D. A childrens Bible Commentary of nearly eight hun-dred pages. Each sermon is headed according tosubject, then follows the text and then the discussion—an easy solution of the ministers most difficultproblem. The Treasury is a splendid companion tothe Expositors Dictionary of Texts. Suggests texts for childrens sermons and supplies-stock-foto

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. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e special needs of the in-vention., whose operation and workinghave been recorded for many years, andas they have been in wide use in mostcountries of the world, answer the ques-tion as to their practicability and reliabil-ity for general public use. As regardquestion No. 3 cost, to answer that ques-tion definitely one must have plans ofthe proposed installation as railwaysdiffer in class: (a) Single tracks; (b)double tracks; (c) sidings; (d) junc-tions; (e) termini. The most difficultproblem-stock-foto

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Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . IKBITABILITY AND SENSATION.. ^^^ERHAPS themost difficultproblem whichthe student ofNatural His-tory can sethimself tosolve, is that which has re-ference to the heading of thispaper; I mean the limits—jwrea W ^ limits there be—between A- fJj&NrTw ^llc muscular movements ofan animal and those of a vege-table ; between what we callsensation in the former andirritability in the latter. Are Diatoms, Desmids,Vol-vocinea), Oscillatorice, and ahost of similar organisms,really vegetables ? I-stock-foto

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woman worried vector. female young, girl, sad, face trouble, unhappy problem, person stress, beautiful woman worried character. people Illustration. woman worried vector-stock-foto

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. Gospel Messenger, The (1921). he greatest thoughts of the worlds greatestpreachers, philosophers, historians, scientists, etc.,are here presented. Carefully classified and indexed. EXPOSITORS TREASURY OF CHILDRENS SERMONS, 56.25 Sir W. Robertson Nicoll, M. A., LL. D. A childrens Bible Commentary of nearly eight hun-dred pages. Each sermon is headed according tosubject, then follows the text and then the discussion—an easy solution of the ministers most difficultproblem. The Treasury is a splendid companion tothe Expositors Dictionary of Texts. Suggests texts for childrens sermons and supplie-stock-foto

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$Atlas and epitome of traumatic fractures and dislocations . Fig. 36.—United fracture of the right clavicle in a man thirty yearsof age. Seen from above and behind. There is an abundance of callus ;the inner fragment is displaced forward and upward, and overrides theouter fragment considerably. (Berliner Anat. Museum; after Gurlt.) causes that produce the displacement. It is well knownthat union of a broken clavicle without deformitywas formerly con-sidered one of thegreatest raritiesand a most difficultproblem to solve. We now havemeans at our dis-posal which enableus, even in theseverest case-stock-foto$

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Watch and clock escapements; . ij». 163 Fig. 163 upon the pallet P, and the tooth b of the ratchet will encounterthe pallet P. This pallet, after suffering its recoil, will receive theimpulse communicated by the tooth b. This escapement surelycould not have given much satisfaction, for it offers no advantageover the others, besides it is of very difficult construction. INGENIOUS ATTEMPTS AT SOLUTION OF A DIFFICULT PROBLEM. Much ingenuity to a worthy end, but of little practical value, isdisplayed in these various attempts at the solution of a very difficultproblem. In Fig. 159 we have a mechan-stock-foto

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