Fundamentos de química y física para la conservación y restauración

Charles Darwin stands as a towering figure in the history of science, who changed the direction of modern thought in establishing the basis of evolutionary biology. These letters offer a fascinating window onto his daily experience, scientific observations, personal concerns and friendships, affording a unique glimpse of Darwin as both naturalist and family man. From his early years at Edinburgh University up to the publication of The Origin of Species in 1859, the letters in this volume chart the most exciting years of Darwin's life, including the voyage of the Beagle and the subsequent...

La presente investigación buscó determinar la efectividad biológica de hongos entomopatógenos, sobre la mosca blanca en el cultivo del algodonero en los ciclos primavera-verano de dos ciclos agrícolas; considerando los tratamientos siguientes en el primer ciclo predio: Paecilomyces (A.M.) aplicación durante la mañana, Paecilomyces (A.V.) aplicación durante la tarde, erticillium (A.M.) aplicación durante la mañana, Verticillium (A.V.) aplicación durante la tarde, tratamiento químico (Herald + Hostation) y tratamiento absoluto. De igual manera, el segundo ciclo incluyó 5...

Pierre-Nol Giraud seala el fenmeno de la desigualdad como punto fundamental en los estudios econmicos. El examen de la doble dimensin -espacial y social- del problema ayuda a Giraud a establecer los fundamentos para una revisin profunda de las teoras econmicas existentes.

Excerpt from Historical Geography of Bible Lands: A Manual for Teachers The subject-matter of the course is weighty enough for adult students, while the method is sufficiently simple and vivid for pupils of fourteen years of age. The thirteen chapters provide a three-months' course of thirteen lessons. The course thus meets the requirements of a summer session of a Sunday school. If a more thorough study of the material provided. By the manual is desired, a course of several months' duration may be arranged by subdividing the chapters and devoting two or more lessons to each of them. This...