Advice as to the Arrangement. 





the class room and prolonged 

 experiments (plant culture, etc.) 

 are impossible, a projection 

 lantern can be kept always 

 in readiness in the biology 

 class room. The biological 

 collection room should 

 communicate directly with the 

 class room. A special room is 

 also necessary for the student's 

 exercises in biology if it is pro- 

 posed to introduce such. 



Where gas is not available. 

 it is desirable to erect a gas 

 plant; this generates gas in the 

 quantity required to be con- 

 sumed at the time, and the plant 

 is very easy to manipulate. 

 The gas can be used both for 

 lighting and heating, 



g and for working gas e n- 



3 g i n e s. 



g Mechanical power is most 

 conveniently obtained from an 

 iJ electrical network. 

 . The machines to be driven are 

 5 worked by electric motors. If 

 g> power from an electricity station 

 is not available, but if gas is 

 "g laid on, a gas engine can 

 Q be erected. If gas also is not at 

 g hand, the gas plant just men- 

 tioned is desirable. In addition, 

 benzine, spirit and petrol en- 

 gines can be usefully employed. 

 For lesser demands, water 

 motors are useful. 



Electric current, which can 

 not entirely be dispensed with. 

 is either derived from the elec- 

 tricity works, or it may be 

 generated in the building by 

 means of one of the e n g i 11 e s 

 mentioned in the last paragraph 

 connected up with a dynamo. 

 It is A-ery advantageous also to 

 install a battery of accu- 

 m u 1 a t o r s, which can be 

 charged from the dynamo, and 

 which is always a ready source 

 of current of regular voltage. 

 In this case, by employing a 

 suitable dynamo, the whole 

 arrangement can be made 

 for that voltage which is most 





Cl. 529:.. 



