Genetical studies on aenothera / Bradley moore Davis.

  • Davis, Bradley Moore.
Date:
1913
Catalogue details

Licence: In copyright

Credit: Genetical studies on aenothera / Bradley moore Davis. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    SHORTER ARTICLES AND DI§fCUSSf)N NOTESfON A DIFFERENTIAL pORTAL/lTY OEKERVED/ BETWEEN TENEBRIO OBSCBTRIS AND T. MffLITOR I REcfeNTL'u had occasion to subject some mjeal worn® for short periods of time to a temperature considerably! higher man that the labbratony. Although the experiment wts begunlwith a dif- ferent Durpqse in vieW, there haslbeen one feature Joted whiq seems worth/recording; at this timl The neal worms used consisted if the larvae of Tenibrio molii Linn, knd f. obscuns Fabr. Thtse larvae lire verymreadily tinguilhed from each other by tie fact that the pilment in integuments of T. motiitor is yellow t to orangi-brown,lvhile thal T. obstunslis almost black. In ol her features the ltpvae resei each cjther/to a remaikable exten I i r ls- e of tie 1XPERIMENTS WITH El 3VATED TUMPERAr Th£ wolms were placed in lar *e Stende * dishes little Imeal and the dishes were t len placec in a tempferatlre incubator, being insulated fr< m the incuBaton by a cork ring and card being tak >n that | of tip dishes did not come in conj act with dhe cop] incubator. The temperature was frequently not< glass do Jr of the incubator and \ as also recorded andjmiiimum thermometer plac ;d inside (of the likefvisq insulated* from contact periments were been observe . major ex tality hac below. m ich higher temperature is obt£ red if contact with llow d. When an experimental disl was not insulated |he 1 irvfe which ; t contained were | ;ad when larvae in still active. des the the urn vith the copper made after a pre These jexperii containing a rge, constant ottom off the he glass r sides o: throug' a maxi: ncubatoriand des or flbor.1 able diffqren nts are sum e walls or floor [om the floor all insulated dish