Prof. Peter Salcher, the professor of physics and mechanics at the R&I Naval Academy in Fiume (Rijeka) was certainly the person that signed the city life during the last decades of the XIX century. His major scientific achievment was taking photographs of fast movements (flying bullets), made in Fiume on Ernst Mach request, by that he is still included into history of physics and photography. Locally, he is the best known by making the first photographs with the Röntgen rays just 3 weeks after Röntgen held lecture on the same subject in Würzburg, that led by purchasing the set-up in 1897, to two years later given to the Municipal hospital. Three of the lectures he held in the Club for natural sciences in Fiume (Rijeka) dealt with the medical topics: Prevention of health and natural ways of healing in which he pointed out the importance of water, air, light and moving in prevention of health. On the other hand, these factors are not suficent for healing, and therefore he is propagating the use of medicines. In the lecture on Moral education of youth his positions are that moral education should be separated from religion, should be included into other subjects and the family should have an important role in it.