OPINIONS FROM OTHERS.
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No Commer Car Agrimotor,
The Editor, THE COMMERCIAL MOTOR.
[1610] Sir,—Regarding the detailed article in your issue of 20th June, describing the Commer Car agrimotor, the article was inserted without any reference to this company whatever, and as its insertion is likely to lead to misunderstanding, we shall be obliged if you will allow us to state that the model referred to is the subject of more than one patent of which the first was taken out in July, 1916. Further, we would inform you that permission to construct one model was obtained from the Ministry of Munitions as long ago as February of 1917, and that we do not propose to proceed further with the model as described in your article.—Yours faithfully, COMMERCIAL CARS, LTD.,
JAMES E. DavrEs, Secretary.
[We are sorry to learn that there is any posaibility of a misunderstanding concerning the description we gave of the clever agrimotor which is the subject Of a, recently completed patent. The article was compiled by a regular and reliable correspondent and, in view of that fact, no reference was. made by us to Commercial Cara, Ltd. (as is stated in the letter from the secretary of the company). Had we, known that the manufacture of the model was not being proceeded with we should certainly have stated the, fact, but the main interest in the article was the mechanical construction, as the means employed by the inventors in manipulating the ploughs was -original and well worth examining.—En. name]
Wanted: An Identification Room.
The Editor, THE COMMF,RCIAL MOTOR.
[16111 Sirs—It was with considerable, interest that. I read Mr. Hallett's contribution on the above subject in. a reaeni Issue. Although the treatments was humorous, he touched on a real problem. For some considerable time now I have been of opinion thatrepresentatives of firms who are. in the habit of making appointments in markets ought towear an identifiCation badge. Surely no person representing a respectable firm would he ashamed of his oecupa tion. If concerns in the agricultural implement and kindred trader would issue badges bearing their. name, to be worn -on the coat lapel of their representatives, it would often save a considerable amount of time and I am sure would lead to lots of new business. 'Personally, I have often had to meet persons whom .1 did not know at markets, and whilst they wasted their time looking for me I was doing likewise. We probably passed each other several times unaware of the fact that here was the man each was looking for. Who will set the fashion ?:---Youra faithfully.G. G.
Suction Gas for Motors.:
[1612] Sir,—In consideration of the present discussion on the above subject, I am reminded of an article which appeared in THE COMMERCIAL MOTOR a few years ago in which it was stated that at the R.A.S.E. trials held at Derby, Messrs. Crossleys withdrew their exhibit, which was thesonly plant possessing, novel features of design. To quote from your article :— "The plant that was withdrawn from the trials unquestionably possessed striking if undeveloped advantages. It embodied the best features of any shown, and it will be found to be the system which, in the near future, most manufacturers will follow. The principal point of difference was the utilization of the heat given off by 'the exhaustgases for the heating of the air and water. This is decidedly a step in the right direction, for, by jacketing the furnace and passing the hot exhaust,gases sound it, the temperature can be maintained with a smaller amount of air, and, therefore, a less total combustion.
"There is one great fault in all gas producers, without exception, and that is the eXcessive weight, which can begreatly decreased. Again, in every instance, the atmospheric nitrogen, which is an inert gas, is introduced into the producer with consequent .reduc
tion in the explosiveness of the suction gas The writer has, recently, tested. a new departure—a gas-producer plant connected lc a petrol engine of b.h.p. The producer, together with its Various appurtenances, weighed only. 15 lb. The engine was direct-coupled to a dynaino, and connected up to volt and ,ammeters so that its power could be seen at a glance.. It was started on petrol, and its efficiency noted. The petrol was -then turned off, and the .suetion-gas drawn into the cylinder.. So powerful did the gas prove itself to be that there was practically no variation' in horse-power, and it is confidently believed by the inventor that-an apparatus of about '20 lb. weight will easily run an ordinary petrol engine of about 20h.p, This will obviously bring a suction-gas plant within the range of • motorcar construations" It would be interesting to know what has become of the plant to which you referred in this article.—Yours faithfully,
VINCENT. Muswell Hill. Ws