cement                 package:MASS                 R Documentation

_H_e_a_t _E_v_o_l_v_e_d _b_y _S_e_t_t_i_n_g _C_e_m_e_n_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     Experiment on the heat evolved in the setting of each of 13
     cements.

_U_s_a_g_e:

     cement

_F_o_r_m_a_t:


     '_x_1, _x_2, _x_3, _x_4' Proportions (%) of active ingredients.

     '_y' heat evolved in cals/gm.


_D_e_t_a_i_l_s:

     Thirteen samples of Portland cement were set. For each sample, the
     percentages of the four main chemical ingredients was accurately
     measured.  While the cement was setting the amount of heat evolved
     was also measured.

_S_o_u_r_c_e:

     Woods, H., Steinour, H.H. and Starke, H.R. (1932) Effect of
     composition of  Portland cement on heat evolved during hardening. 
     _Industrial Engineering and Chemistry_, *24*, 1207-1214.

_R_e_f_e_r_e_n_c_e_s:

     Hald, A. (1957) _Statistical Theory with Engineering
     Applications._ Wiley, New York.

_E_x_a_m_p_l_e_s:

     lm(y ~ x1 + x2 + x3 + x4, cement)