19,985 research outputs found
[Southern Pacific, ''Prosperity Special'', Baldwin Locomotive Works]
No full textRecto: [imprinted] Santa Fe Type Locomotives built for the Southern Pacific Lines, Equipped with Superheaters, Feed Water Heaters and Boosters. The Baldwin Locomotive Works, Philadelphia. [autographed] S M Vauclain. Verso: [handwritten] Southern Pacific ''Prosperity Special'' Baldwin. Samuel M. Vauclain standing left
[Carolina, Clinchfield & Ohio Ry., Railway Co's Class M-2, Road No. 550]
No full textRecto: Clinchfield, C. C. & O. 550. Verso: Negative No. 3329, The Baldwin Locomotive Works, Class 16 42/68 1/4 D D 1, Road No. 550, Built for Carolina, Clinchfield & Ohio Ry., Railway Co's Class M-2
Genetic Assimilation and Canalisation in the Baldwin Effect
No full textThe Baldwin Effect indicates that individually learned behaviours acquired during an organism’s lifetime can influence the evolutionary path taken by a population, without any direct Lamarckian transfer of traits from phenotype to genotype. Several computational studies modelling this effect have included complications that restrict its applicability. Here we present a simplified model that is used to reveal the essential mechanisms and highlight several conceptual issues that have not been clearly defined in prior literature. In particular, we suggest that canalisation and genetic assimilation, often conflated in previous studies, are separate concepts and the former is actually not required for non-heritable phenotypic variation to guide genetic variation. Additionally, learning, often considered to be essential for the Baldwin Effect, can be replaced with a more general phenotypic plasticity model. These simplifications potentially permit the Baldwin Effect to operate in much more general circumstances
[Calumet & Ariz M Co., Erecting Card Drawing No. 5279]
No full textErecting card drawing for Calumet and Arizona Mining Company.This erecting drawing was created for Calumet & Arizona Mining Company, Class 04-2/50 C 146. Erecting Card 5279. Index Number: 675-43. For more technical details on this drawing, see Baldwin Erecting Drawings by Road Name: http://www.smu.edu/~/media/Site/libraries/degolyer/pdfs/BLW-EDWG-RoadName.pdf and/or Baldwin Erecting Drawings by Class Number: https://www.smu.edu/~/media/Site/libraries/degolyer/pdfs/BLW-EDWG-Class.pdf (Note: Search by Index Number or Erecting Card Number)
[Boston & Maine Railroad, Road No. 3316]
No full textRecto: B. & M. R. D4 Verso: Negative No. 1694. Baldwin Locomotive Works. Class 10 38 E 697, Road No. 3316 [handwritten] 21762 [Boston + Maine Railroad
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