W. A. Norton on Ericsson's Calorie Engine. 393 
only succeeded in finding the ovaries unusually developed in a 
lew instances. H. Fitzinger, himself, has met with the ovaries 
ina state of active development in only one instance; and up to 
the present time, according to him, neither ova nor embryos have 
ever yet been discovered in the oviducts. 
quiescence, the right ovary was 0-98 of an inch long,—the left 
Somewhat smaller. The cavity of the organs was lined by a 
mucous membrane, beneath which were to bé seen the whitish, 
globular, nearly transparent ova, varying in diameter from ,';th 
of an inch downward. The oviducts were a pair of slender and 
Perfectly straight tubes, which, commencing by a wide aperture, 
at some distance anterior to the ovaries, and rinning down on the 
ouler and posterior aspect of these organs, opened into the clo- 
aa, Just above the orifices of the ureters. 
In another specimen, however, obtained at the Vienna Muse- 
Um, the organs were in a high state of development. The right 
ovary was 1-75 inches, the left 1-64 inches long, and they con- 
tained, together, 66 roundish, opaque ova, of a deep yellow color, 
and evidently just ready to be discharged. ‘Their average size 
Was a little less than 4th of an inch in diameter. The oviducts 
Were much larger than in the other specimen, and exceedingly 
contorted, so that they must have attained two or three times their 
ordinary length. None of the ova, however, had yet left the 
ovaries, so that nothing new could be learned with regard to the 
— Westion of viviparity. 
ee 
Arr. XLVIL—On Ericsson’s Hot Air, or Caloric Engine ; by 
Witttam A. Norton, Professor of Civil Engineering in Yale 
College, 
mance. 'The notice referred to describes the stationary test-en- 
gine of 60 horse-power, which was set up in the manufactory of 
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