MANY initial difficulties having been overcome, Paris has now a zoological park worthy of the nation, constructed in the Bois de Vincennes upon ground reserved by a law of 1860. The Pare zoologique du Bois de Vincennes, recently inaugurated by the President of the Republic, covers a triangle of about 14 hectares, the longest side bordering Lake Daumesnil. At one of the main entrances rises a hill 68 metres high, on top of which a group of picturesque rocks ingeniously masks two great reservoirs containing the water necessary for the animals. The general idea has been to avoid the stilted cramped zoological garden of the past and to exhibit the animals in open and appropriate spaces, as if in a state of semi-liberty. The photo graphs illustrating Jean de la Cerisaie's article in La Nature of July 1, p. 30, show that the idea has been carried out with skill and artistry. The Zoological Park of Vincennes with its 1,500 animal inmates takes its place worthily with the other modern zoos of Europe.