636-638 



636 Petri Dishes, in pairs, (or cultures, depth 15 nun., bottom of basin and top of cover 



polished, diameter of bottom dish, ;i in. 



per pair, 9d. ; per do/en pairs, 8/- ; |*r KIM-< 4 14 



637 Petri Dishes, in pairs, for cultures, bottom dish 15 mm. deep, top of cover polished. 



Diameter of bottom dish i\ 2 2j 3 4 41 i> m. 



Per pair .. 4d. 5d. 7d. 8d. lOd. lid. 1 . 



Per dozen pairs . . 3/6 4/6 6/- 7/6 9/- 10/- 17/6 



638 Glass Basins (Petri Dishes), in pairs, for cultures, depth 15111111., unpolished. 



Diameter of bottom dish . . . . . . . . *..;.'. 4 m. 



Per pair . . . . . . . . 7d. 9d. 



Per dozen pairs . . . . . . . . . . . . 6/- 8/- 



639 



640 



639 Petri Dishes, large size, as used by the Pasteur Institute of India, etc., bottom dish 22 cni. 



diameter by 22 mm. deep. per pair, 2/- : per dozen pairs 1 3 



640 Petri Dishes, with shoulder, polished lid and bottom of lower dish (German War Office 



pattern), diameter of top dish 10 cm. .. .. ., .. per dozen pair-. 



641 Double Dishes, in pairs, shallow, for water analysis, 5 mm. deep, j| in. diiimei' ;;*. 



636/638) . . . . . . . . . . . . . . .. per pair 1 



642 Glass Basins, strong, with drop-on covers 

 Diameter, external 

 Price each 

 Price per doz. 



