21. Keith also took many photographs during the expedition, some of which were later hand-coloured as lantern slides . 22. The heyday of the lantern slide lasted one hundred years, more or less, from 1860 to 1960. 23. The glass used in many of them consisted of 15 cm x 10 cm lantern slide plates. 24. His knowledge of the Settlers and his lantern slide lectures made him a sought-after speaker on the subject. 25. They met with Frederick H . Evans'son, who sold Witkin a block of platinum prints and lantern slides . 26. Photographs This collection consists of about 3, 500 prints, glass negatives and carte-de-visit, plus 2, 190 lantern slides . 27. During his lecturing career, many tens of thousands of people were entertained with lantern slides of British bird life. 28. The library also holds a hand-colored lantern slide of the iris bowl garden from the 1920s or early 1930s. 29. The glass plate lantern slides and many of the photographs taken by Baker were hand-colored by his wife Edith. 30. The bingo hall and again closing in 1983, before reopening for a time to show historic magic lantern slides .
