The passage discusses the content and significance of various scientific papers and books. It highlights the contrast between questions posed in the context of experimental results and those presented in the form of short communications. Notable contributions include Bullough's work on a substance he isolated from epidermis, which inhibits mitosis in mouse epidermis, and Feldman et al.'s experiments on thymectomized mice and tumor rejection. The text also criticizes the overuse of the Jacob and Monod model without experimental validation, suggesting that such theoretical exercises may not be useful for experienced investigators. Additionally, it reviews Ewald R. Weibel's book on morphometry of the human lung, praising its innovative approach to combining mathematical formulations with morphological data, and discusses Cunningham's and Kiss and Szentagothai's anatomy textbooks, noting their updates and improvements.The passage discusses the content and significance of various scientific papers and books. It highlights the contrast between questions posed in the context of experimental results and those presented in the form of short communications. Notable contributions include Bullough's work on a substance he isolated from epidermis, which inhibits mitosis in mouse epidermis, and Feldman et al.'s experiments on thymectomized mice and tumor rejection. The text also criticizes the overuse of the Jacob and Monod model without experimental validation, suggesting that such theoretical exercises may not be useful for experienced investigators. Additionally, it reviews Ewald R. Weibel's book on morphometry of the human lung, praising its innovative approach to combining mathematical formulations with morphological data, and discusses Cunningham's and Kiss and Szentagothai's anatomy textbooks, noting their updates and improvements.