Not only will the aëroplane connect France more closely with Africa; it will likewise bind together the various sections of France's colonial territory in Africa, The Sahara Desert will become a less formidable obstacle to intercommunication. French pilots have made experimental flights over parts of the Sahara in a search for the best routes and landing places, as links in communication between Morocco and the Ivory Coast. When technical progress and perfected organization place the world's main airways in operation, there will be enormous saving of time on the longer routes. The estimated time for transatlantic flights from London to New York by the three million, five hundred thousand cubic feet dirigibles is two to two and one-half days, Other likely figures for various services are as follows: _London to India and Australia_: London to Cairo 2,050 miles Cairo to Colombo (via Aden) 3,400 miles Colombo to Perth (Australia) 3,150 miles At an average speed of sixty miles per hour, and with a stop of twelve hours at each station for re-fueling, the times taken would be London to Cairo 34 hours, or 1-1/2 days London to Colombo 34 + 12 + 58 hours = 104 hours, or 4-1/2 days By train and mail steamer, the journey to Ceylon at present takes fifteen days, and to Australia over thirty days. _Cairo to Cape Town_: Cairo to British East Africa (Nairobi) 2,100 miles--35 hours Nairobi to Cape Town 2,200 miles--37 hours Total time from Cairo to Cape Town, allowing for a break of twelve hours at Nairobi 84 hours Owing to variation in the weather conditions, latitude in estimating the time of arrival must be permitted in each case. Where, however, there is a saving of several days in comparison with steamship travel, the difference of a few hours matters little. In years to come, with the development of airship transport to the most distant centers of the world, it is conceivable that no important city will be further from London than ten days' journey. The following table, as applied to a London terminal, is by no means fantastic: To New York 2--2-1/2 days " San Francisco 4-1/2 days " Cairo 1-1/2 days " Colombo 4-1/2 days " Perth 7 days " Nairobi 3-1/2 days " Cape Town 5-1/2 days " Rio de Janeiro 4 days