...in the early part of the year 1854, to repeat and extend some of the experiments, — the memjbers of which were General Totten, Professor Bache, and...have been surprised with unforeseen difficulties at every step of their progress, and have come to the conclusion that the processes usually employed for...

...facts of general interest, or which may be of importance to those engaged in similar researches. Though the art of building has been practised from the earliest...have been surprised with unforeseen difficulties at every step of their progress, and have come to the conclusion that the processes usually employed for...

...facts of general interest, or which may be of importance to those engaged in similar researches. Though the art of building has been practised from the earliest...have been surprised with unforeseen difficulties at every step of their progress, and have come to the conclusion that the processes usually employed for...

...facts of general interest, or which may be of importance to those engaged in similar researches. Though the art of building has been practised from the earliest...have been surprised with unforeseen difficulties at every step of their progress, and have come to the conclusion that the processes usually employed for...

...facts of general interest, or which may be of importance to those engaged in similar researches. Though the art of building has been practised from the earliest...have been surprised with unforeseen difficulties at every step of their progress, and have come to the conclusion that the processes usually employed for...

...investigations, and to embrace in them a greater variety of the building materials of this country. Though the art of building has been practised from the earliest...durability of stone appears to have received but little defi nite scientific attention, and the commission, who have never before made this subject a special...

...investigations, and to embrace in them a greater variety of the building materials of this country. Though the art of building has been practised from the earliest...subject a special object of study, have been surprised wilh unforeseen difficulties at every step of their progress, and have come to the conclusion that...

...of importance to those engaged in similar researches. Though the art of building has been practiced from the earliest times, and constant demands have...but little definite scientific attention; and the members of the commission, who had never before made this subject a special object of study, were surprised...

...of importance to those engaged in similar researches. Though the art of building has been practiced from the earliest times, and constant demands have...but little definite scientific attention ; and the members of the commission, who had never before made this subject a special object of study, were surprised...

...method of making the experiments. DURABILITY. 19. " Although the art of building has been practiced from the earliest times, and constant demands have...best materials, yet the process of ascertaining the durability of stone appears to have received but little definite scientific attention, and the processes...