21 



claim to have made the necessary modifications, consisting of different 

 types of footling and discharging mechanism, and steam-coils of 

 extra capacity. It might also be advantageous, for the reasons 

 already explained above, to insert between the two towers a chamber 

 in which the seed could be allowed to remain hot for some time before 

 being cooled again. With such modifications the machine should 

 prove satisfactory. It is not expensive to erect and should be the 

 most economical of all to run. since the steam consumption is reduced 

 to a minimum by utilizing the heat from one lot of seed to heat the 

 succeeding lot. The manufaci urer.s were anxious to erect a demons! ra 

 tion machine in Egypt, but eventually abandoned the idea owing 

 to the difficulty of transport during \var-ti 



For further particulars apply to the Hess Warming A: Ventilating 

 Company, Tacoma Building. "> X. la Salle Street. Chicago. 111.. U.S.A. 



(8) The Neumancantelli Hot-air Machine. An experimental model 

 of an exceedingly ingenious machine, designed by Mr. I. Xeuman. 

 was erected by Mr. .Mancantelli of the firm of .Messrs. Alien Aldorson 

 & Co. It consisted of six cylinders on a revolving lia.se. which at 

 definite intervals was moved round by a. piece of automatic apparatus 

 until each cylinder occupied the position occupied previously lv the 

 one next to it. The six positions represented six stages in treating 

 the seed. In the first the cylinder was filled with sent ; in the second 

 a current of air at 30 ('. was circulated through the cylinder : in the 

 third a current of air at 40 C. ; in the fourth a current of air at f><>" ( '. : 

 in the fifth a current of air at :>:>" C. ; and in the sixth the seed was 

 discharged. The whole apparatus, though the process sounds rather 

 complicated, was so ingeniously contrived that the only parts of the 

 whole process that needed human attention were the filling and the 

 emptying of the cylinders. The advantages claimed for the system were 

 that owing to the gradual heating in stages, the seed would lie dried 

 before being exposed to the higher temperatures and would t herefore be 

 less liable to damage, and also that owing to the air being at the 

 temperature requisite for the treated seed there could be no possibility 

 of overheating the seed. Unfortunately, in practice, it was found to 

 be impossible to get a sufficiently rapid current of air to raise the 

 temperature of the seed at a reasonable pace. From the specific 

 heats and specific gravities of air and cotton seed it can be calculated 



