This page needs to be proofread.
708
��Popular Science Monthly
���The four tubes of the new subway under the Harlem river in ^ewYo.k city are bip^tm See in the trench which has been dug in the river bottom, concrete is sent dovm through
�� �
708
��Popular Science Monthly
���The four tubes of the new subway under the Harlem river in ^ewYo.k city are bip^tm See in the trench which has been dug in the river bottom, concrete is sent dovm through
�� �
