EXPERDCEXT ST. i Bl KD. 



purpose of learning the effects of various predaceous animate and physical and 

 chemical reagents upon mosquitoes in their differ*. - 



It was found that various s water beetles, particularly ot the genera 



- .irval dragon fl gs, some 



importance in the destroetion of larval mosquitoes. The authors determine: 



_ . - o»f mosquitoes possess a great resisting power toward low 

 :.- t-.- •.--■? Z r" :-v_:^rj::-r- < : '.- : !'■•-" '. '. -. -- - : —: ;■ - - -■ . : : 

 a number of hoars. Agitation of the water or the prodnction of currents in the water 

 i.- T-jred : bai e no :~ riienee on mosquito eggs. Larvae also proved to be ab. 

 resist a temperature of — 4 = C, but could not withstand high temperatures, such as 

 - was found that in a dry :. ii'iou the larva? of mosquitoes had little 



Macerated solutions of hemp and flax had no influence upon the mosquito la - 

 •= iilr ir. -\-~. ■ : :::- - ; -. - : - ■ ■ ■ :... : . .-. r. v : ': -.-::'-.- ' .-.:-. ': :':- ;-.- - 



were quickly desi st iutions of lysoform, petroleum, and saproL 



Mosquito larvae appear not to be adapted for living in water which is greatly 

 agitated by the wind, or in which strong currents are developed. They may live for 

 months in winter without food, but at other seasons die within 7 to 12 days if not 

 fed. An attempt was made to detejrmine the effect of cultures of BaeHIu* *uhtffi* on 

 mosquito Larvae, but tt-r res not satisfactory. In the nymph condition 



- • - : '.r. '. " ' - " ---.:" " ■ . ; • - . * : - - ::.-:; - - - ■ - : 



to high temperature- In this stase m jtsqoit :e? withstood desiccation very success- 

 :i..y 7 ...t :.;..;'-■- — " " -" - " :-.:. ■ -r-r "..- .-- :: 



succumbed rapidly to the action of kerosene and saproL The further development 

 of the nymph was not much influenced by the agitation of the water. It was found 

 that aduh mosquitoes could live for at leas: - - ~ithout food, while in winter 



the fasting power is even much greater. Adult mosquitoes also showed great 

 resisting power to low temperate - 



Beekeeping - Tramnaal Agr. Jomr.. i £, pp. 538, 539). — 



Brief notes are given on the form and size of sections most suitable for use in bee- 

 hives, and on the storage of honey for the purpose of securing the proper ripening. 



Bcrier of the principal work of the sericultural station at Murcia for 

 1904. El Lora Rctumem At Im priiueipaks tratajm rtalhado* at este estahledmignto 

 mmrmmk la eampribi sedan de 1304- Jfureia: Ettacirm Sa-Koia, 1204. pp- ~-> - — Brief 

 notes are given on the extent of the silk industry as indicated by reports received at 

 the sericuhnxal station at Murcia, together with an account of the work of this 

 station in the study of silk production, distribution of silkworm eggs. etc. 



Silk production in Persia in 1904. G. P. Rita E- jr., Ind. e 



Cam. \Bnmte\. —Brief notes are given on the number 



of cocoons of different races of silkworms produced in Persia for the past 10 years. 



FOODS— STTRTTTOS. 



:: ~'..~-~:ri--~.--~- ~.^\ -. r:.~ . : i. : ;'. :rs : ~ ::?r-:::: : .- i 

 health I, Boric acid and borax. H. W. Wilet kt j & Ikpt. Ayr., Bureau 



«f Gemriatrm Bid. 84, pi~ 1, } arU 8>.— This bulletin presents a full 



report of the experiments with healthy young men given boric acid and borax, 

 of which a brief summary of the principal results has been previously noted 

 :. . 16, p. 1*. 

 It is stated that during the whole course of observation 607.4 pm- of preservative 

 in the form of boric acid or its equivalent in borax was given, of which 77.16 per 

 cent was recovered in the urine. As regards food consumed in relation to body 

 ■light, fittfe difference was observed in the different experimental periods, the total 



