24 



The Philippine Journal of Science 



1918 



These experiments were conducted with a moist heat such as 

 would be found in the steam drum. The experiments of 75° 

 and 80° were conducted at exposures from ten to thirty-five 

 minutes. Cigars were partly hollowed out, the insects in dif- 

 ferent stages put inside the holes, and the cigars wrapped again 

 with tobacco leaf and subjected to heat. A temperature as low 

 as 60° C. for twenty minutes killed the cigarette beetle in all 

 stages. 



Table XIV gives the results of experiments with steamed 

 tobacco made into cigars. 



Table XIV. — Results of experiments with cigars made from, steamed 

 tobacco and guarded against reinfestation. 



Kind of cigar. 



Number 



of 

 cigars. 



Date 

 made. 



Treatment. 



Date 

 boxed. 



Date 

 exam- 

 ined. 



Remarks. 



Tem- 

 pera- 

 ture. 



Dura- 

 tion. 



Perfectos 



Conchas 



VegTieros finos- 

 Londres 



Perfectos 



Conchas 



Veguerosfinos- 

 Londres 



Panatelas 



Perfectos 



Media regalia _ 



High life 



Panatelas 



Perfectos 



Media regalia . 

 High life 



100 

 100 

 100 

 100 



100 

 100 

 100 

 100 



100 

 100 

 100 

 100 

 50 

 50 

 50 

 50 



June 24 



June 27 



July 12 

 July 12 



°C. 

 96 



102 



120 

 100 



Mins. 

 20 



25 



15 



20 



June 30 



June SO 



July 21 



July 21 



rJuly 13 

 Aug. 9 

 Sept. 8 

 Oct. 12 

 Nov. 10 

 Jan. 8 

 July 13 

 Aug. 9 

 Sept. 8 

 Oct. 12 

 Nov. 10 

 Jan. 8 



fSept. 27 

 Nov. 8 

 Jan. 8 



Sept. 27 

 Nov. 8 

 Jan. 8 



Cigars made and kept in a 

 screened room; good at 

 each examination. 



Do. 



Cigars made in general 

 room and kept in screen- 

 ed room; good at each 

 examination. 



Cigars made in general 

 room and kept in tight 

 tin boxes; good at each 

 examination. 



Cost of steaming. — As nearly all cigar and cigarette factories 

 in Manila are at present equipped with machinery and boilers, 

 the only cost to those who wish to use this method is that of 

 the drum and its installation. Since the steaming process is 

 of short duration, it would be difficult to calculate the actual cost 

 of treating the tobacco where machinery is already installed. 



In the application of steam, the principal requisite is that the 

 wrapper tobacco should not become too wet. 



Where cold storage is available, the cigars can be stored for a 

 time with good results, provided a sufficiently low temperature 



