Hydro med usæ (HYDROID A)

Colonial Hydrozoa, usually fixed, and giving rise to medusoid buds that carry the sexual cells. These buds may be set free as jellyfish having a velum, or be retained as rudimentary medusa-buds. The following IMG:content-0705.png:[graphic] Armstrong's Hydro-Electric Machine. friction of the condensed water against the cooled steam nozzles. It was found that the form and material of the jet had an important effect on the result. The machine consisted of a small steam boiler, insulated on four gla legs and having a line of jets at the top. Opposite the jets was placed a prime conductor, also insulated, and furnished with a set of metal points, against which the steam rushed, thus parting with its positive charge.