Major element oxide data from the three laboratories compare favorably. Totals for the altered sample (Sample 1188B) are low, probably because of the presence of anhydrite and pyrite. Only a few trace elements show some discrepancy, and possible reasons are indicated in Table T1. Rare earth elements show disparity for Gd, Ho, Er, and Yb. USGS standard reference materials analyzed as unknowns with the Acme Analytical Laboratories samples are shown in Table T2. This compilation suggests that the samples analyzed were homogeneous and that published bulk rock analyses from these three laboratories on samples collected during Leg 209 are congruous.