. American bee journal. Bee culture; Bees. 360 AMERICAN BEE JOURNAL. June 6, 1901. drones from laying- workers vrere unable to furnish sperm- cells that would fecundate the eggs. That the drones from the two sources may differ would not be exceptional, as there is a wasp which has two kinds of drones. It is not known, however, whether or not these drones have a differ- ent parentage. ARTIFICIAL PARTHBNOGEXBSIS. The interesting experiments of Morgan and Loeb, which show that by the addition of certain salts the unfer- tilized eggs of sea-urchins may be made to develop more or less completely, h
. American bee journal. Bee culture; Bees. 360 AMERICAN BEE JOURNAL. June 6, 1901. drones from laying- workers vrere unable to furnish sperm- cells that would fecundate the eggs. That the drones from the two sources may differ would not be exceptional, as there is a wasp which has two kinds of drones. It is not known, however, whether or not these drones have a differ- ent parentage. ARTIFICIAL PARTHBNOGEXBSIS. The interesting experiments of Morgan and Loeb, which show that by the addition of certain salts the unfer- tilized eggs of sea-urchins may be made to develop more or less completely, have attracted very general attention among naturalists. Recently, some further experiments by Fieri and Winkler have been made in somewhat the same direction. These scientists took the sperm, shook the same up in either sea or distilled water then filtered it and added the filtered portion to unfertilized eggs. As a check, other unfertilized eggs were placed beside the former and treated the same way, except the decoction from the sperm was withheld. Many of the eggs to which the sperm extract had been added, partially developed, which was true of none of the others. It was found that the sperm extract made in sea-water was more efficient than that made in the distilled water. To any one who has studied marine organisms, this is no surprise. These experiments are interesting to bee-keepers. It would seem that in certain cases other stimuli than sperm-cells may induce the commencement at least of development. How it is that the drone-eggs develop without any stimulus at all is still a mystery which possibly may never be solved. WHAT IS DIGESTION ? I am surprised at what the Editor states in the opening paragraph on page 195. He says that Mr. Root is still in doubt about my criticism of his definition of digestion. I doubt if Mr. Cowan claims to be a physiologist. He quotes in giving his definition of digestion. He certainly quoted from a very able physiologist. I am sure, howeve
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Keywords: ., bo, bookcentury1800, bookdecade1860, booksubjectbees, bookyear1861
