Popular Science Monthly 



603 



A Small Filter for Light 

 Machine Oils 



A GREAT many differently constructed 

 practical filters can be made for light 

 machine oils, where they are not circulated 

 too rapidly or in a great quantity. The re- 

 sults sought in 

 such a locally 

 constructed de- 

 vice are simplic- 

 ity of parts, op- 

 eration and oil 

 delivery. 



The illustra- 

 tion shows a fil- 

 ter which is very 

 serviceable 

 where the oil is 

 required to be 

 thoroughly^ 

 cleaned but is 

 not needed in 

 a very great 

 quantity. The 

 outer shell may 

 be built from 

 any tin can or 

 receptacle of a 

 suitable size. 

 Another receiver 



of the same nature, but a trifle smaller 

 is used for holding the dirty or filtering 

 oil. A number of strips of candle wicking 

 or light cotton rope are thrown over the 

 sides of the inner can and held to the 

 outside by means of the looped wire 

 strip. Through the strong capillary- 

 action of the oil and rope or wicking the 

 best of the oil is raised, and drips down 

 into the outer shell where it is drained 

 oflf as it is wanted. The inner recepta- 

 cle should be cleaned as often as 

 necessary. The dimensions given are 

 for a filter that was made and used with 

 excellent results. — F. W. Bentley. 



Getting Rid of the Destructive 

 Attacks of White Ants 



WHITE ants are pests the attacks of 

 which must be guarded against, 

 since they may seriously damage wooden 

 structures, stores of food and clothing, 

 field crops and plants. They have been 

 known to eat out the core of a wooden 

 beam for several feet before being 

 discovered. Woodwork which is in con- 

 tact with damp soil is especially likely 



to be infested. The ants colonize in 

 large numbers and attention is generally 

 attracted to them by the passing in and 

 out of the flying members of the colony 

 during the swarming time in the spring. 

 Long tracks of earth leading to a section 

 of a structure is also an indication of 

 their presence. If in- 

 fested timber has not 

 been weakened too 

 much, it need only be 

 frequently drenched 

 with kerosene; but if it 

 has been too much eat- 

 en away, it will be 

 necessary^ to replace it 

 with new timber. Treat- 

 ing the new timber with 

 coal-tar creosote will 

 keep the ants away. 

 If the colonies nest in 

 the ground near the 

 wood, applications of 

 carbon bisuN 

 phide may be 

 used. 



Should stores 

 of food and 

 clothing be at- 

 tacked , the 

 rooms in which 

 they are stored 

 should be thor- 

 oughly sprayed 

 with a 5 per 

 cent solution of 

 kerosene emul- 

 sion. The cloth- 

 ing and similar 

 goods should be 

 aired in the sun. 

 Field crops 

 and plants are 

 liable to be at- 

 tacked when 

 near ground 

 which has been 

 recently cleared 

 and which con- 

 tains decaying 

 logs and stumps. Such attacks can gener- 

 ally be pre\ented by plowing late in the 

 fall the ground in which the crops are to be 

 planted. Should the pests appear in 

 spite of this, the young sprouts should be 

 sprinkled with the 5 per cent kerosene 

 emulsion. Infested trees and flowers should 

 be treated with the solution in the same 

 manner. 



The filter for separating 

 the oil from the ^diment 



