BAIRD &TATLOCK (LONDON) LTD. 



To freeze with ether the microtome should be equipped with its ether spray apparatus. The latter is provided 

 with a spray tube, which tapers towards the front so as to dimmish its tendency to clog, and to enable the operator 

 to readily clean it at any time from the back with the aid 01 a tine orobe. The tubes, especially the one admitting 

 tin: ether, should fit tightly, otherwise the atomizer will not work satisfactorily. The highest level of the ether in 

 tin- spray-bottle should be 2 or 3 cm. above the plane of the freezing stage. It should also be noted that before 

 m Txing preparations hardened in 10% formol, these should be lightly washed in 5%, or even more dilute, solutions 

 ni [ormol (obtainable by the simple addition of water), since the presence of a strong solution of formol renders it 



nit, especially in summer, to reach the freezing point by the ether spray method. 



The supply of CO 2 is regulated by a lever fitted to the freezing apparatus itself. Before turning this lever 

 (lie valve of the cylinder, which should always be in an inverted position, should, of course, be opened slightly. 

 A fresh cylinder should be stood quietly in its stand for half to one hour before using it. The valve should then 

 be opened to expel any water which may have collected in the dome to obviate its passage to the freezing apparatus 

 and consequent congealing within its interior. 



1618 T Microtome, of iron, with nickel-plated fittings, clamp and stage, and automatic adjustment 426 



1619 T Ditto with adjustment by hand . . . . . . . . . . . . 3 10 



1620 T Freezing Apparatus with ether spray, complete .. .. .. .. 16 



1621 r Additional Knife-clamp for tangential cutting . . . . . . . . 0100 



1622 T Knife .. .. .. .. .. '.. .. ..056 



1623 r Case and Honing and Stropping Tube . . . . . . . . . . 036 



1624 T Carbonic Acid Freezing Apparatus .. .. .. .. 1 12 6 



1625' Folding Stand for carbonic acid cylinder .. .. .. .. .. .. 10 9 



1626' Box fitted with lock .. .. .. .. 10 6 



1627 

 Aug. Becker's Small Student's Microtome for freezing by ether. 



It is, in particular, fitted with the same form of knife guide, seeingthat this has proved eminently satisfactory, 

 microtome is provided with a simple form of automatic advance, and is available for use with an ether freezing 

 ratus, an object clamp, and a disc to which the object may be luted. The automatic advance is much the 

 .is that of microtome No. 1618. 



1627 T Automatic Microtome of iron with nickel-plated fittings, including an ether freezing 



apparatus, clamp, disc and knife . . . . . . . . . . . . 2150 



1628 T Box fitted with lock and key . . ..086 



1629 r Aug. Becker's Small Student's Microtome with hand feed-ratchet No. 2 with object 



clamp and disc for celloidin and paraffin, including one knife . . . . . . 186 



1630 T Ether Freezing Apparatus for use with ditto . . . . . . 0110 



1631* Box fitted with lock and key . . . . ..060 



CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS- 



