Chemical Frost - And The Microscope (1930) скачать в хорошем качестве

Chemical Frost - And The Microscope (1930)

Story about various types of frosts. First are the tiny frost crystals of "hydrochloric acid". A drop of the acid is placed on a piece of glass. A drop of ammonia is added. Smoke emerges from the drop and crystallising takes place. The glass slide is placed under the microscope. We see the crystals growing (may be time lapse photography). They make fern-like shapes. We see more crystals growing. Salt crystals are shown growing under the microscope. Sodium Sulphide crystals are next. The famous "pyramid" crystals of sodium carbonate are shown. Was an item in Pathe Pictorial issue number 648. FILM ID:904.04 A VIDEO FROM BRITISH PATHÉ. EXPLORE OUR ONLINE CHANNEL, BRITISH PATHÉ TV. IT'S FULL OF GREAT DOCUMENTARIES, FASCINATING INTERVIEWS, AND CLASSIC MOVIES. http://www.britishpathe.tv/ FOR LICENSING ENQUIRIES VISIT http://www.britishpathe.com/ British Pathé also represents the Reuters historical collection, which includes more than 136,000 items from the news agencies Gaumont Graphic (1910-1932), Empire News Bulletin (1926-1930), British Paramount (1931-1957), and Gaumont British (1934-1959), as well as Visnews content from 1957 to the end of 1984. All footage can be viewed on the British Pathé website. https://www.britishpathe.com/