Document DMqJkmBnXgLm2XyrXddMvNVEd

POWGf EnfnEf$ Hotfitiook [Coruinued from page 106) HOW TO PATCH TRACING PAPER Clear nail polish, the 5 4 10 variety, makes transparent repairs to tracing paper that has been torn or worn through by erasures. The patching edges do not print and the repaired section Is stronger than the paper. Take a new piece ol tracing paper, place it over the back of the area to be repaired and tack it Io place with piece* of cellulose tape. Fig. 1. With a sharp knife, cut through both patching paper and tracing around the area to be m Areplaced. Carefully pec] cut from the treeing; Uc^S patching piece to the tracing pjjj cellulose tape on the (rent tide tape and excess patching Dll2?,i the back. Then apply nail polM butt joint of the patching plJJ tracing on the back. When Sj coot dries within a few mloWe, a second coat, When polish djJJ! ,away tape. William Kacan Brooklyn BURN SULPHUR INSTEAD OF USING SULPHURIC ACID Ik treating cooling-tower and ipiay- pond water to reduce calcium and mag nesium carbonate, eulphor burning can replace sulphuric acid, which It hard both to handle and to proportion cor rectly. This practice effect* considerablo saving io our plant, reducing treatment coats to half. It represents about t20Q to $250 monthly reduction. Sulphur ignites, melts and burns readily making it easy to construct a burner. The burner yre started with and used tor a number of months was a laundry tub of S0-in. dia. To keep the sulphur molten during cold weather Insulate the tab with 2 is. of magnesia as shown in the sketch. An iron cover or hood should be provided to keep out rain and snow. Bursar sue can be found by trial and error. Our SO-in. burner consumed 200 lb of sulphur a day. On days of heavy blowdown then this was insuffi cient we would fight off an additional pail or two of sulphur. With the hom ers set at the cooling tower the latter acted as an absorber lor the sulphur $ fumes. They entered the induced^ type tower through the air iolttl were completely absorbed befa*'^ ing out the top. There wu oalfy slightest "sweetish" smell at the to*j air outlet. 5 The fog issuing from the ten slightly heavier during the winter,ft has not proved objectionable, horn even lor an In-town location, . Whan the tower water must be d. lasted, atop the sulphur burning lc long enough period la advance loti sulphurous acid to be completelyv diced to sulphuric acid, or the chlu will be used up. We kept ours s8j one hour In advance and an addin hour after chlorination was eoajli K M White Clinton, fa* IM 1175) Sheet-Metal Housing Protect* Outdoor Motor To prevent the accumulation ol dust end grease on a motor driving an out door pump, a sheet-metal housing was fitted snugly over the motor. The hous ing has gaps to span the power con nection and to leave the bearing ends exposed for inspection. The skirt or housing base aligns with the motor base, but leaves sir gaps around ends and across lha feet of the mala easting. Air entering tho bottom Hows up around the motor and out through the slot at the top. A curved cover set about lVfc In- above the slot allows air circulation but excludes rain and wind blown trash. Welded up from light sheet metal the cover can be placed or removed by ono man and needs only on occasional coat of paint. M H Pearce Carriage, Texas CONTRIBUTIONS INVITED Do you have Ideas and ttcbj nlqoe* that have boon *accatftli?i osed fa practice? Then why ok' pass them along for everybody's, benefit by sabmiuiog them for pob' llettlon la this department? Pwv ptys 120 for each item accept'd. Yoor manuscript need only bo rough draft form, containing all the facts, and yoor sketches in pe&eiL We will take care of (busting theta up. Power Engineers* notebook will be devoted to power problems, b(| and little, dealing with design, operation and malntenaoeo. lhT will range over tb entire field--mechanical, electrical, hydraulic* immoral, operating procadofOV maintenance reduction, tatting, ***