Observa sentence example
- Descriptive chemistry was now assuming considerable proportions; the experimental inquiries suggested by Boyle were being assiduously developed; and a wealth of observa tions was being accumulated, for the explanation of which the resources of the dominant theory were sorely taxed.
- Gradually, from Eratosthenes to Tycho, Hipparchus playing the most important part among ancient astronomers, the complex astrolabe was evolved, large specimens being among the chief observa tory instruments of the 15th, 16th and even 17th centuries; while small ones were in use among travellers and learned men, not only for astronomical, but for astrological and topographical purposes.
- The agreement thus brought about between the results deduced from the law of radiation and the most delicate observa tions of the quantity of heat radiated is of great interest, as showing that the theory of cosmicai temperature now rests upon a sound basis.
- It comprises, besides observa tion and experiment (which is, in fact, onlytheobservation of abnormal social states), a certain peculiarity of verification.