Microtetrameres sp. (Nematoda: Tetrameridae) Host and Geographic Records Extended

Host and geographic records of Microtetrameres sp. are extended. One hundred thirty-eight birds were examined including 10 genera, 10 species and 5 families. Two species were infected with Tetrameres sp., one with over 40 females

White Leghorn Egg Production During Traffic-Noise Stress

Two groups of white leghorn hens were subjected to 95 db (C) level of traffic noise and 65 db (C) level of ambient non-traffic noise. No statistically significant difference in egg production was detected between the two groups

Etymology: A Plea for Its Use in Early Education

My belief, based upon watching numerous students mature at Iowa State University, is, if etymology were stressed in primary and secondary schools, more older students would feel less burdened with so-called big, scientific names as well as nonscientific terms

Far-nix and Lar-nix Diesected

High school teachers do a wonderful job. This observation is of long standing and particularly true when one considers the handicaps under which these teachers operate. They not only must give of themselves and of their time, but each must be the disciplinarian, father-confessor, and big-buddy of the students. They must cope with school boards and parents, take tickets and usher! For all their expertise in these many areas, we on the outside thank these teachers

Trematodes of Passerine Birds from Chickasaw County, lowa

One-hundred and twenty-five passerine birds were collected in Chickasaw County, Iowa, October, 1959 through August, 1960. Thirteen species of birds (19%) were infected with 14 genera of trematodes. The hosts, helminths and infection sites are tabulated

Gravity and Signature Change

The use of proper ``time'' to describe classical ``spacetimes'' which contain both Euclidean and Lorentzian regions permits the introduction of smooth (generalized) orthonormal frames. This remarkable fact permits one to describe both a variational treatment of Einstein's equations and distribution theory using straightforward generalizations of the standard treatments for constant signature.Comment: Plain TeX, 6 pages; to appear in GR

Effects of an Acoustic Stimulus upon Growth, Antibody Synthesis and Leukocyte Values

Physiologic effects of an acoustic stimulus of 1.0 Khz at 96 db(A) upon female hooded rats are discussed. Six possible reasons are offered for failure to attain statistical significance, except in intermediate aspects, between control and experimental animals

Reply Comment: Comparison of Approaches to Classical Signature Change

We contrast the two approaches to ``classical" signature change used by Hayward with the one used by us (Hellaby and Dray). There is (as yet) no rigorous derivation of appropriate distributional field equations. Hayward's distributional approach is based on a postulated modified form of the field equations. We make an alternative postulate. We point out an important difference between two possible philosophies of signature change --- ours is strictly classical, while Hayward's Lagrangian approach adopts what amounts to an imaginary proper ``time" on one side of the signature change, as is explicitly done in quantum cosmology. We also explain why we chose to use the Darmois-Israel type junction conditions, rather than the Lichnerowicz type junction conditions favoured by Hayward. We show that the difference in results is entirely explained by the difference in philosophy (imaginary versus real Euclidean ``time"), and not by the difference in approach to junction conditions (Lichnerowicz with specific coordinates versus Darmois with general coordinates).Comment: 10 pages, latex, no figures. Replying to - "Comment on `Failure of Standard Conservation Laws at a Classical Change of Signature'", S.A. Hayward, Phys. Rev. D52, 7331-7332 (1995) (gr-qc/9606045