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Planisphere Terrestre. Suivant les nouvelles Observations des Astronomes. Dressé et presenté au Roy
1. Planisphere Terrestre. Suivant les nouvelles Observations des Astronomes. Dressé et presenté au Roy tres Chretien par Mr. Cassini le Fils. De l'Acadmie Royale des Sciences. / A Leide Ches Pierre van der Aa. Avec Privilege.
Cause of Submarine Springs: (aa) Sea Water; (bb) Fresh Water; (cc) Impermeable Strata; (dd) a Permeable
2. Cause of Submarine Springs:
(aa) Sea Water; (bb) Fresh Water; (cc) Impermeable Strata; (dd) a Permeable Stratum in which the Fresh Water Flows
[Quahog Eggs]: Fig.15.--Ciliated gastrula, ten hours after fecundation. The embryo Can now swim through
3. [Quahog Eggs]:
Fig.15.--Ciliated gastrula, ten hours after fecundation. The embryo Can now swim through the water by means of hairlike cilia. The larger cells have become invaginated.
Fig.16.--Trochosphere stage, twelve to fourteen hours after fecundation. The body has elongated and the cilia are now confined to the front end. The opening of the primitive mouth (pm) cn be seen on the lower side, while above is a slight indentation corresponding to the eginning of the shell gland (sg).
Fig.17.--Formation of the shell, which arises at two symmetrical points of calcification, right and left of the median line, and gradually envelops the animal.
Fig.18.--Early veliger swimmer with velum extended from the shell, about thirty-six hours after fecundation. aa, anterior adductor muscle, pa, posterior adductor muscle, s, stomach, a, anus, mt, mouth, v, velum.
Fig.19.--Veliger slightly older than shown in Fig.18. The intesting (i) has elongated, and the liver (l) is more prominent.
Section of Coral-Reef AA, Outer edges of the fringing-reef, at the level of the sea. BB, the shores
4. Section of Coral-Reef
AA, Outer edges of the fringing-reef, at the level of the sea. BB, the shores of the fringed island. A'A', Outer edges of the reef, after its upward growth during a period of subsidence, now converted into a barrier, with islets on it. B'B', the shores of the now encircled island. CC, Lagoon-channel
Sections of Barrier-Reefs Vanikoro (1), Gambier Islands (2), Maurua (3) The horizontal shading
5. Sections of Barrier-Reefs
Vanikoro (1), Gambier Islands (2), Maurua (3)
The horizontal shading shows the barrier -reefs and lagoon-channels. The inclined shading above the level of the sea (AA) shows the actual form of the land; the inclined shading below this line shows its probable prolongation under water.
Section of Coral-Reef AA, Outer edges of the fringing-reef, at the level of the sea. BB, the shores
6. Section of Coral-Reef
AA, Outer edges of the fringing-reef, at the level of the sea. BB, the shores of the fringed island. A'A', Outer edges of the reef, after its upward growth during a period of subsidence, now converted into a barrier, with islets o
Sections of Barrier-Reefs Vanikoro (1), Gambier Islands (2), Maurua (3) The horizontal shading
7. Sections of Barrier-Reefs
Vanikoro (1), Gambier Islands (2), Maurua (3)
The horizontal shading shows the barrier -reefs and lagoon-channels. The inclined shading above the level of the sea (AA) shows the actual form of the land; the inclined shading
Cylindre de glace sortant du moule de fonte AA
8. Cylindre de glace sortant du moule de fonte AA
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