SCIENCE-GOSSIP. 



camera being forty, or two packets. In this 

 system the films are notched along each side, and 

 a' piece of mill-board is packed between each film, 

 which is also notched so as to alternate with the 

 notching on the film, and it is upon this notching 

 that the whole system of changing the film 

 depends. This is an exceedingly clever device, 

 and, if the instructions are followed, the changing 

 is both rapid and sure. The " Frena " is made in 

 box form, in several sizes and types ; also 

 as a folding camera, with detachable box. 



Fnj. -i. The "Frexa." 



The No. 00, memorandum size, viz. 3f x 2| in., is 

 the smallest size made, and is very useful for 

 travellers, where bulk is a consideration. Although 

 the picture is small, it is a very pretty size, lend- 

 ing itself admirably for enlargement purposes. 

 The lens is a •• Beck" 4^-in. achromatic, working 

 at F. 11, F. 16, F. 22, and F. 64. The "Memo 

 Frena " has a fixed focus ; that is to say, every 

 object over 14 ft. distance will be fairly in focus. 

 It is fitted with time and instantaneous shutter, 

 working from ^ to ^ of a second and time. 

 There is an indicator to record how many films 

 have been exposed ; it is also fitted with a swing 

 back, and with two fenders, one vertical, the 

 other horizontal. The price of camera fitted with 

 forty films is £2 18s. 6d. 



The Xo. " Frena'" is similar in every respect to 

 the Xo. 00, except that it is fitted with Beck's 

 '■ Autograph " Rapid Rectilinear lens, with a work- 

 ing aperture of F. 8. The price, with forty films, is 

 £5 5s. 



The Xo. 2 '• Frena" is for 4J x 3J in. films, and 

 is fitted with a 5|-in. single achromatic lens work- 

 ing from F. 11. The other details are as in Xo. 00. 

 The price, with forty films, is £5 8s. 6d. 



The Xo. 2 "Frena " is the same as Xo. 0, except 

 in size of film, which is 3J x 4J. or ordinary |~ plate 

 size; price £8 17s. (id. when charged with 40 J- plate 

 films. 



The Xo. 3 " Frena " is for ."> x 4 in. films, and is 

 fitted with a 6|-in. Beck Autograph Rapid Recti- 

 linear lens, with a working aperture of F. 8. 



Magnifiers may be fitted to all the types of 

 " Frena " cameras. These are a series of single 

 lenses wdiich fit on to the front of the permanent 

 lens, by which means objects near to the camera 

 may 'be photographed. Thus, for example, the 

 nearest object that can be sharply photographed 

 with the Xo. 2 "Frena" would be 20 ft. 

 away, whilst by the addition of suitable magnifiers 

 objects may be taken as near to the camera as 

 4 ft. These magnifiers are generally sold in sets 



of four, which will bring an object in focus at the 

 following distances: Xo. 1, 27 to 9 ft.; No. 2, 

 10 to 6 ft, : No. 3. 6 to 4| ft. ; and No. 4, 4£ to 



H ft- 



These cameras may now be had fitted w r ith the 

 Beck-Steinheil orthostigmat lens for an additional 

 cost of from £3 to £6. 



The new folding " Frena " is an adaptation of 

 the box form of camera, having precisely the same 

 changing arrangement, but in which the front of 

 the camera carrying the lens and shutter is made 

 to fold, thus reducing the size of the instrument 

 very considerably. This alteration also carries 

 with it the additional advantages of allowing 

 lenses of different foci to be used, and permits of 

 focussing the. image on a ground-glass screen or 

 to scale, and allows the use of a rising front for 

 both vertical and horizontal views. Another great 

 convenience in this new form of " Frena " is that 



i-i'j.A'iK Picture taken with No. 2 "Frexa." 



the whole film-changing portion of the camera 

 may be removed, and leave a complete camera 

 which can be used with double dark slides, thus 

 enabling the possessor of such an instrument to 

 use either films or glass plates. The folding 

 " Frena " cameras are made in three classes — Nos. 

 6, 7. and 8 — and range in price from £11 18s. 6d. 

 to £3 17s. The No. 8, which is the best of this 

 class, is fitted with a Beck-Steinheil 2-foci ortho- 

 stigmat lens, 4f-in. focus in combination, and 

 8j -in. focus wdien used as a single long-focus 

 lens. The full aperture of this lens is F. 6'3, 

 (Ti> be continued.) 



