Switchin' Kitten the blue dog whose brain was switched with the cat and a cuckoo clock's mooing bird. He then encounters Jerry, and begs and pleads for him to squeak, but the mouse roars like Leo the Lion and even has a gold-ribboned mouse hole (with the phrase of Ars Gratia Artis as part on the MGM logo). Terrified, he blasts off like a rocket out of the castle and runs off. The clouds separate revealing Jerry's winks to the camera and audience, as the cartoon closes with the same opening template, with the only difference that Tom's face is depressed and
Artis Library library was able to stock its shelves. In 1881, librarian Gilles Janse compiled a catalogue of the Artis Bibliotheek’s collection holding 4,381 items. The Artis Bibliotheek grew to include more than 16,000 titles. From 1848 to 1995, the Zoological Society Natura Artis Magistra published the journal "Contributions to Zoology". All issues of this journal are now in the Artis Bibliotheek collection. Initially, Westerman kept many of the library’s items in his home; the collection, however, has been housed in its own building at the zoo since 1859. In 1868 the collection was moved to the building on the Plantage Middenlaan.