INTRODUCTION. 7 



the exception of those of Bichat, Weber, and Brums; further- 

 more, the figures of injections in Berrcs' ' Anatomic der 

 Mikroskopischen Gebilde des mcnschlichen Korpers,' Heft 1-12 

 (Wien, 1836-42), are for the most part excellent, as are the 

 representations of tissues in R. Wagner's 'Icones Physiologicae,' 

 second edition, by A. Ecker. Those of Langenbeck, f Mikro- 

 skopisch-anatomische Abbildungen.' Lief. 1-4, (Gottingen, 

 18-10-51) ; of A. II. Hassall, 'The Microscopic Anatomy of the 

 Human Body' (London, 1810-49) ; and Mandl, ' Anatomic 

 Microscopique' (Paris, 1838-48), are middling; while, on the 

 other hand, those given by Quekctt, f Catalogue of the Histo- 

 logical Series in the Museum of the Royal College of Surgeons 

 of England' (London, 1850), are admirable. 



As regards Microscopes, I may express my opinion that of 

 the more easily accessible, those of Plossl, Oberhauser and 

 Schiek, take the first rank. In Italy Amici, in England 

 Ross, Powell and others, produce instruments quite equal to 

 the above, but out of the question for Germany; among small, 

 cheap, but not particularly useful instruments for students and 

 physicians, for 115 to 150 francs, George Oberhauser (Rue 

 Dauphine, 19, Paris,) furnishes the best. The much-famed 

 instruments of Nachet are good, but inferior to those of 

 Oberhauser ; on the other hand, the small ones of Schiek for 

 40 thalers, and those of Plossl for 70 to 100 Fl., would be 

 very serviceable if these artists were as productive as Oberhauser. 

 For the use of the microscope I refer to J. Vogel, f Anleitung 

 zum Gebrauche des Mikroskops' (Leipzig, 1841) ; H. von 

 Mohl, < Mikrographie' (Tubingen, 1810); Harting, f Het Mi- 

 kroskoop deszelfs gebruik, geschiedenis en tegenwoordige 

 toestand' (Utrecht, 1848-50), 3 Theile; Purkinje, article 

 ' Mikroskop,' in Wagner's ' Hand worterbuch der Physiologic,' 

 Bd. 2, 1814; in which works, as well as in that of Quekett, 

 f A Practical Treatise on the Use of the Microscope' (London, 

 1818, translated by Hartmann, Weimar, 1850, [also Ed. 2, 

 London, 1852)] ; and Robin, f Du Microscope et des Injections 

 dans leurs applications a l'Anatomie et h la Pathologie' (Paris, 

 1848), the preparation of microscopical objects is in part very 

 elaboratelv treated of. 



A collection of microscopical preparations is indispensably 

 necessary for a more exact study of Histology, especially 



