PARK SANITATION 887 



tions of the Hodge trap have no outside screen and the flies pass through 

 the holes into the outer air. The Hodge trap is most efficient when all the 

 other windows and the doors of the room are darkened. 



Fly wire and fly paper. The sticky fly mixture or fly glue consists of 

 ten parts of castor oil or linseed oil, eight parts of powdered resin, and one 

 part of powdered acacia, by weight. The oil and the resin are brought to 

 boil separately and then mixed and allowed to boil for fifteen minutes. The 

 acacia is then slowly added, care being taken to prevent the mixture from 

 boiling over. The proportion of the oil and resin should be varied accord- 

 ing to the temperature and the consistency desired. When cool, this mix- 

 ture is applied to wires with a brush. The glue adheres better to rusty than 

 to smooth wire. Pieces of wire about eighteen inches long which have been 

 treated in this manner are hung from the ceiling or other convenient places. 

 Flies habitually tend to alight on hanging wire or strings, and wires coated 

 with fly glue are, as a rule, more effective than fly paper. The flies are 

 wiped off with a cloth and the wire recoated with the glue. Fly paper can 

 be made by coating paper with the fly glue, but it will probably be much 

 simpler to buy the ordinary fly paper. Fly paper is more efficient if placed 

 in the form of an arch rather than flat. 



Fly poison. A safe poison can be made as follows: Milk, ^4 pint; 40 

 per cent formaldehyde, i]/2 teaspoonfuls ; sugar, 10 ounces; lime water, 

 sufficient to make I pint. Or, sodium salicylate, 3 teaspoonfuls; brown sugar, 

 i or 2 teaspoonfuls; water, I pint. The fly poison is placed in a shallow dish, 

 or an ordinary drinking glass is partly filled with the solution and inverted 

 over a saucer or other flat dish lined with white blotting paper. A small 

 match stick is placed under the edge of glass and as the solution evaporates 

 from the paper more flows out of the glass. Other fluids should be protected 

 from flies so that they will be compelled to drink the poisoned solution. 



Screening. The doors, windows and other openings through which 

 flies can gain entrance into a building should be screened. 



Bedbugs. 



It has never been definitely proven that bedbugs transmit disease, but 

 nevertheless every effort should be made to eradicate them as soon as a 

 room in an inn or camp is discovered to be infected. As a rule the bedbug 

 deposits its eggs in cracks and crevices of walls, floors and furniture. Wooden 

 bedsteads should never be used in inns or camps, as these provide many places 

 in which the bedbugs will thrive. As the eggs as well as the adult bug must 

 be destroyed, the walls, floors, beds and crevices in the furniture should be 

 thoroughly scrubbed with hot water and soap, followed by a liberal applica- 

 tion of gasoline or kerosene, which will penetrate and kill the egg, and 

 should be forced into every crack that can be found. Where possible the 

 bedding should be washed in hot water or carefully ironed with a hot iron 



