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Show j OWNERS' SERVICE I DEPARTMENT 4 I have been a reader of your valuable department for some time and I would like to ask a question. Is the so-called liotebkiss drive a form of bevel drive or ia it.i new method of propulsion? Now Owner. Hotchkiss drive 'is not what you think. It is simply a method of utilizing utiliz-ing the springs to take both driv and to pivc stress. In this way, tho torque tu lies or other special members r or taking these stresses arc dispensed with. Is calcium chloride a satisfactory anti freeze agent? I have always used alcohol, but it is too expensive, and I'm a little at a loss to know what to do. j Sam J. Jewctt. Calcium chloride serves very well to prevent freezing, but it has a tendency to attack some metals. Why not use one of the prepared anti-f reeze compounds, com-pounds, which are effective and have been neutralized to prevent their attacking at-tacking metal. The evaporation in one of the jars f my storage battery is much more rapid than iu the others. Can you tell me how to overcome this? Stewart Williams. Wil-liams. Get a new jar. The "evaporation" you speak of is undoubtedly a leak in "the jar. Tn climbing a hill my engino makes a noise like a willow stick dragging against the spokes of a wheel: also the t ar fails to start when .1 set tho starting start-ing mechanism gnintr unless I have previously pre-viously primed it. Knginc always starts t after being warmed up. J Low do you account for the noise and starting trouble? W. A. Mnbey.. You evidently advance your spark too far when climbing hills, causing a pack pressure on the pistons, which will |