Frog Lateral view

While the frog lateral view will improve the detection of subtle slips, all or none of the above radiographic signs may or may not be present and it is important that when clinical suspicion persists, further imaging should be considered (Figs. 13.4, 13.5). 

This view was supported by the observation that choline on treatment with nitric acid yielded a product having a pharmacological action similar to that of muscarine as known up to that time. Comparison of the natural and artificial products by Bohm showed that the former was much more active than the latter and that its action was antagonised by atropine, whilst the artificial muscarine had a curare-like action on the atropinised frog. Later, Nothnagel investigated the action of... 

Shortly after the end of the Second World War, Robert E. Davies (pronounced Davis) became a student of Hans Krebs in Sheffield. Davies worked with immense diligence on secretion of acid by the frog stomach, submitting his Ph.D. thesis on the subject in 1949. By 1955, when Davies expounded his mature views on the subject at a symposium in Madison, Wisconsin, he and his collaborators had published 17 papers on the subject, each filled with more data than with argument.Immediately after the symposium Davies moved to the University of Pennsylvania, and although he did work with a student on acid secretion, work to be cited later, he turned to other subjects. Here I shall summarize his work to 1955. 

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