Total cross sections of nuclei for 280 Mev neutrons.

The measurement of 28O-Mev neutron cross sections of various nuclei is described. The neutron beam used results from 340-Mev protons in the 184-in. cyclotron striking a 2-in. Be target. The neutron detector consists of a double coincidence anthracene scintillation counter telescope which counts recoil protons scattered at 15 deg from a paraffin cylinder placed in the collimated neutron beam. A 2-in. Cu absorber placed between the counters assures that only protons of energy greater than 250 Mev are counted. The cross sections for all nuclei measured from Li to Pb are smaller than the corresponding cross sections measured at 90 Mev by factors between 0.5 and 0.6.

Exotic microlepidoptera.

Mode of access: Internet.

Filices exoticæ; or, Coloured figures and descriptions of exotic ferns, chiefly of such as are cultivated in the Royal gardens of Kew,

Mode of access: Internet.

Proceedings of session, host-specificity testing of exotic arthropod biological control agents : the biological basis for improvement in safety /

"August 2000"--Cover.

Caspari Commelin ... Horti Medici Amstelædamensis plantæ rariores et exoticæ ad vivum æri incisæ

Mode of access: Internet.

Analysis of (n, 2n) cross sections for nuclei of mass A>30 /

"Physics; Reactor technology--TID-4500, 36th ed."

Pocket handbook for the recognition and diagnosis of certain animal diseases exotic to most of the Americas /

Microfiche sheets have title: Clinical diagnosis of selected diseases exotic to most of the Americas.

Pocket handbook for the recognition and diagnosis of certain animal diseases exotic to most of the Americas /

Includes bibliographical references.

Report of the Committee on Exotic Diseases.

Includes bibliographies.

Pocket handbook for the recognition and diagnosis of certain animal diseases exotic to most of the Americas /

Includes bibliographical references.

The coming of the pond fishes; an account of the introduction of certain spiny-rayed fishes, and other exotic species, into the waters of the lower Columbia river region and the Pacific coast states,

Mode of access: Internet.

The botany of Bihar and Orissa : an account of all the known indigenous plants of the Provence and of the most important or most commonly cultivated exotic ones /

Mode of access: Internet.

Exotic aquarium fishes; a work of general reference,

Maps on lining papers.

Hortus Elginensis, or, A catalogue of plants, indigenous and exotic, cultivated in the Elgin Botanic Garden, in the vicinity of the city of New-York : established in 1801 /

Includes index.

Hortus cantabrigiensis, or An accented catalogue of indigenous and exotic plants cultivated in the Cambridge Botanic Garden /

Includes index.