منابع مشابه
Charles Darwin, ichthyology and the species concept
This issue of Fish and Fisheries, devoted to the‘Species Concept in Fish’, could bene¢t, one might think, from a brief review of what Charles Darwin (1809^1882), the founder of evolutionary biology, might have to sayabout ¢shes and the species concept. Darwin, as every biologist knows,wrote numerous books on particular groups of organisms: barnacles, orchids, earthworms, but neveron ¢shes.To co...
متن کاملEvolutionary steps in ichthyology and new challenges*
One may postulate that man’s interest in fish emerged as soon as he was able to express his thoughts and notions as fish, among other animals, were subject of early communications. These were transmitted first by drawings, later by inscriptions and in writings. It was but much later that fishes began to occupy man’s interest as objects of science. Aristotle’s treatises on “History of Animals” i...
متن کاملReport of the Board of State Charities of Massachusetts
Through the courtesy and kindness of Dr. Nathan Allen we have received the thirteenth Annual Eeport of the Massachusetts State Charity. The Eeport is most admirably drawn up, and contains a careful description of the various Lunatic Hospitals, with remarks upon the condition of Lunacy in the State. We read on page 64 : " It is in the highest degree desirable that the hospitals and asylums in wh...
متن کاملThe state of the medigap market in Massachusetts.
EXECUTIVE SUMMARY Medicare, the federal health insurance program for the elderly and disabled, leaves beneficiaries responsible for substantial deductibles and co-payments. In addition, certain services, notably prescription drugs, are not covered. To protect themselves from high out-of-pocket costs, many Medicare beneficiaries purchase supplemental insurance policies known as " medigap " plans...
متن کاملRisk selection in the Massachusetts State employee health insurance program.
Using the Diagnostic Cost Group (DCG) model developed from a national sample, we examine biased selection among one fee-for-service (FFS) plan, one preferred provider organization, and several health maintenance organizations (HMOs) in Massachusetts. The proportions of enrollees in low-risk groups are higher in the HMO plans and lower in the FFS plan. The average age in the FFS plan is 9 years ...
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ژورنال
عنوان ژورنال: Science
سال: 1904
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.20.506.321