BAIRD &TATLOCK. (LONDON) LTD. 



3202 



3203 



3205 



3202 Colorimeter, Stokes', two Nessler tubes with tubulure at side, one graduated, glass plate 



in frame acting as support, over white opaque glass, complete, with two extra Nessler 



tubes . . . . . . . . . . . . . . . . ..0160 



3203 Stand for Six Nessler Tubes, blackwood, with opal glass base plate, for use hi testing 



successive water distillates 036 



3204 Nessler Tubes, plain polished bottom, ungraduated. 



A. 6 by i in 



B. 12 by i in. 



each, 6d. ; per doz. 056 

 9d. ; 086 



3205 Morphia Assay Bottle, designed by Hermann Gardner, Esq., F.C.S., M.P.S., Miller Hospital, 



Greenwich . . . . . . . . . . . . . . . . each 050 



Extract from the " Pharmaceutical Journal." 



"A. MORPHINE PRECIPITATION BOTTLE. 

 " By Hermann Gardner, F.C.S., M.P.S., Chemist to the Miller Hospital, Greenwich. 



" During the process of assaying opium and its preparations by the official method it is necessary to employ 

 a wide-mouthed bottle, wherein precipitation of the morphine may take place. The removal of the precipitated 

 morphine from an ordinary bottle, ;;uch as indicated by the ' Pharmacopoeia,' is usually troublesome, owing to the 

 interior corners and the shoulder. There is also some risk of loss of morphine should the stopper be lifted by 

 the ether vapour during shaking on account of the character of the neck and lip. Then, too, the common hollowed 

 stopper is a source of annoyance, inasmuch as any morphine clinging to its inner sides necessitates additional 

 and especial care in washing therefrom. In order to obviate these imperfections and causes of anxiety, I have 

 designed a bottle, the construction of which is calculated to facilitate the removal of the precipitated morphine, 

 and at the same time to minimise any risk of its loss. Reference to the illustration will show the absence of 

 awkward interior corners, a shoulder being absent and the bottom concave. The base of the stopper runs to 

 a point at an approximate angle of 140, thereby assisting any fluid containing morphine in suspension remaining 

 thereon after shaking to drop back into the bottle. The stopper is accurately ground to fit the bottle, which 

 is extended beyond it, upwards and outwards, to a length of 19 millimetres, the rim being 13 millimetres away 

 from the vertical. This prevents any possibility of loss of morphine should the stopper be lifted, and moreover 

 tends to diminish risk of loss during decantation." 



3206 T Standard Scale of Nickel-Plated Steel, divided into centimetres and millimetres, on 



one edge . . . . . . . . In mahogany case, (a) i metre 4 10 



(b) 3 10 



Each Scale is fitted with an end ring for hanging in a vertical position. 



3207 T A Certificate from the National Physical Laboratory can be supplied with any Standard 



Scale for an extra charge of . . . . . . (a) If verified to .01 metre 076 



(b) .001 14 



