Stand III M. 

 Stand for crystallographic and petrographic investigations. 



The focussing appliances and tube-carrier the same as in other models 

 of Stand III; -Draw-tube, with rack and pinion, is at the lower end provided 

 with slide to admit mounted AMICI-BERTRAND lens through an opening in 

 the outer tube. In lock-up mahogany cabinet. 



Stands III M are furnished with : Polariser I, Analyser - with graduated 

 circle - - capping the ocular, Analyser mounted slidable immediately above the 

 objective, Selenite plate Red of the I. Order, Mica plate Y 4 ^, Binx-KLEix Quartz 

 plate ; suitable arrangements are made allowing these crystal plates being inserted 

 in a sliding-carrier situated above the objective. 



The objectives a () and 81 can be used on Stand III M when they are supplied 

 in a special mount only. (See p. 21.) 



Stand III M can be supplied either with revolving and centring vulcanite 

 stage or the large mechanical stage, both stages being graduated at the 

 circumference and having line index. 



No. Marks Codeword 



(J605 Stand III MD with Revolving Vulcanite Stage and ordinary Con- 

 denser num. Ap. 1.40 500. Paryadres 



(610 Stand III MD as above, hut with swing-out Condenser num. Ap. 1.40 525. Par j jrronmi 



($705 Stand III ME with Large Mechanical Stage and ordinary Condenser 



num. Ap. 1.40 575. Paryphe 



(J710 Stand III ME as above, but with swing-out Condenser num. Ap. 1.40 600. Purysatis 



In the swing-out Condenser num. Ap. 1.40, as supplied for 

 Stand III M, the two upper lenses are easily detached, since their 

 mount, not being attached by screwing, simply slips on above the 

 lowest lens. 



To facilitate the employment of Apparatus measuring the angles of axes of 

 crystals, a piece can be inserted between stage and tube-carrier involving an extra cost 

 of 8 Marks. Should this insertion-piece be subsequently required to be adapted, 

 it will be necessary to return the stand to our Works or to one of our Branches. 



The compensating ocular 4 and HUYGENIAN ocular 2* can not be used on Stand III M. 



