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One stellate compound plant hair, one Gemiasma verdans, two pollen. Grass flower dew. Some large white sporangia filled with spores. Grass blade dew, not anything of account. One pale Gemiasma, three blue Gemiasmas, Cosmarium, Closterium. Diatoms, pollen, found in greenish earth and wet with the dew. Remarks: Observations made at the pool with clinical microscope, one-quarter inch objective.
A few minutes earlier a small patch of the sun had been thrown up on one of the black streaks above the horizon. All hands are cheered by the indication that the end of the winter darkness is near.... Clark finds that with returning daylight the diatoms are again appearing. His nets and line are stained a pale yellow, and much of the newly formed ice has also a faint brown or yellow tinge.
Nevertheless, the positive and negative evidence all points the other way. The skeletons of the full-grown, deep-sea Globigerinoe are so remarkably solid and heavy in proportion to their surface as to seem little fitted for floating; and, as a matter of fact, they are not to be found along with the Diatoms and Radiolaria in the uppermost stratum of the open ocean.
Nevertheless, the positive and negative evidence all points the other way. The skeletons of the full-grown, deep-sea Globigerinæ are so remarkably solid and heavy in proportion to their surface as to seem little fitted for floating; and, as a matter of fact, they are not to be found along with the Diatoms and Radiolaria, in the uppermost stratum of the open ocean.
Observations conducted at Cuxhaven in 1839, had revealed the existence, at the surface of the waters of the Baltic, of living Diatoms and Radiolaria of the same species as those which, in a fossil state, constitute extensive rocks of tertiary age at Caltanisetta, Zante, and Oran, on the shores of the Mediterranean.
For a long while they were believed to be living animals, like the rhizopods. Scientific men are now, however, pretty well agreed that they really are only vegetables or plants. The diatoms have each one a tiny shell or shield, not made of lime like the rhizopod-shells, but of flint. Some think that common flint may be formed of these tiny shells.
Nevertheless, the positive and negative evidence all points the other way. The skeletons of the full-grown, deep-sea Globigerinae are so remarkably solid and heavy in proportion to their surface as to seem little fitted for floating; and, as a matter of fact, they are not to be found along with the Diatoms and Radiolaria, in the uppermost stratum of the open ocean.
Where it is too cold for surface animal life, as in the Antarctic Ocean, these dead diatoms form the mud on the bottom of the ocean, and in the extremely deep parts, the sea-bed is red clay, but most of it is an 'ooze' 'Globigerina, as it is called made up of the shells of those very creatures you have now been seeing on that microscope slide.
Transparent objects, particularly crystals which will not polarize, diatoms, infusoria, palates of mollusks, etc., can not only be seen to greater advantage, but their parts can be more easily studied.
I bought a microscope and peered into tissues, pollen cells, diatoms, ditch ooze; and pitied my clever and very talented grandmother who died ignorant of the family secrets revealed by 'totemism', ignorant of 'parthenogenesis' which proved so conclusively the truth of her own firm conviction, that the faults she deplored in her son's children were all inherited directly from her daughter-in-law, whom she detested; ignorant of the fact that the sun which she regarded as a dazzling yellow fire was by bolometric measures shown to be in reality of a restful, and refreshing blue color.
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