this is a simple demonstration--how to install a unitized curtain wall on site this is a simple demonstration--how to install a unitized curtain wall on site Skip navigation
David Livingstone (19 March 1813 â 1 May 1873) was a Scottish Congregationalist pioneer medical missionary with the London Missionary Society and an explorer in Africa.
âTHE GREATEST MARVELS OF AFRICAâ. So proclaimed the Welsh explorer Sir Henry Morton Stanley when, in 1888, he led the first expedition across the forests of the northern Congo.