Newton's lantern slide catalogue: section 2 (circa 1920)

43, Museum Street, London, W.C.l, V. THE MAGNETIC FIELD. A SerJea of Direct Photographs showing the Lines of Foroe in the Magnetic Field. Plain Slides, 2s. each. m;ement a bo at a hotiMhoo msgnsi I 7 Arrangement about two p (fallal bar tr h ii ii with Kailor I with their disaimlla M „ the two limilar polea of two adjacent i . m n ii with Kailor with their dlnimllar polea t- M „ the two ilmilar polea ot two adjacent V bar magneta S „ „ one pole of a bar magnet £ ’ „ „ the two d l aa lmll a r polea of S „ „ a single bar magnet. ^ two bar magnate 10 „ „ two parallel bar magnate , „ w w tha three almllar polea of with their similar pole*,, three bar magneta adjacent _ f •_ -. m a two like poles and one unlike *r pole of three bar magneta For other Slides on^Magnetic^Curvcs,"see"pagCjl 17. B F Z '■X ,, RAYS AND THEIR APPLICATIONS. The collection of slides detailed below will serve to illustrate the many sided and important »W-day applications of X-rays to the arts and industries. Some of these applications ir«*associated with the war, more particularly in the examination of materials and struc- ta. Other applications are concerned more especially with peace industries. The method of X-ray inspection has the great advantage of not injuring a body in any . ly v Furthermore, it provides in many cases the only means of detecting concealed fects in a material or of scrutinising in a structure the accuracy of assembly of component its which Are hidden from view. An„examination of the list will explain the interest which the subject has been found [jonesa for almost any audience. The illustrations are drawn from a variety of subjects agiiig from Aircraft Materials and Structures to Old Masters, Flowers, Welds, Tyres, tiger Prints, Golf Balls, etc. ‘X-rays are now known to he light waves of extremely short wave-length, and an example 111 be found among the slides of X-ray spectra showing complete resemblance to ordinary (Et spectra. •For further information reference may be made to " X-RAYS," by Dr. G. W. C. Kaye iongmans). Plain Slides, 3s. 6d. each. ^.Two radiographs of tha hand showing the im- 21 Watch, showing works and detail of thickness of mense improvement* in radiography since wheels, the discovery of X-ray*. 22 Electrically heated coffee-pot. (a) By Mr. Campbell Swinton, F.R.S., in 23 Silver spruce and West Virginia spruce used in 1896, exposure 20 minutes. aeroplane construction. *9* * (b) By Dr. R. Knox in 1920, exposure 1-100 24 Silver spruce showing also aluminium washer <J, \ , second. and steel wiring plate. !'X-ray spectra of platinum, copper and lead at 25 Silver spruce showing concealed grub holts and. £■ different exciting voltages snowing spectral remains of grubs. X ■ line* and quantum limit. (Muller.) 26 Mill-plywood used in aeroplane construction > Radiograph of hand of mummy of Egyptian Prin- showing defects. 1 cess, 4,500 B.C. (Knox). 27 Laminated spar showing large concealed grub £ X-tay photograph of finger prints (H. Bed ere). hole. r Radiograph of arm Inside an artificial arm of 2B Laminated spar showing concealed knots and r- aluminium alloy. (B.T.H.) grub holes. S Artificial teeth showing construction and defects. 29 Built-up aeroplane spar showing poor workman- 7 .Radiograph of Flowers—carnations and ferns, *t»ip. • etc, (KnoxJ ’ 30 Built-up aeroplane spar showing poor workman- s' ttadiograph of Flower*—roses, etc. (Knox.) ship. B Aeroplane pQot't Electrically heated Jacket 31 Aeroplane spar of box type, showing forbidden showing break in heating element. Joints in ply-wood side. 0 Motor tyre, showing burst. 32 Box-spar showing badly shaped end block split 1 Aeroplane landing wheel tyre. by screws. 2 Carded motor tyre. 33 Aeroplane strut not '• bottoming" Into its 3 Dunlop magnum tyre partly dissected (Dunlop aluminium sockets.