We have been studying the interaction between nematic liquid crystals and interfaces. It has been found that a surface that anchors the director in a perpendicular orientation tends to induce smectic layer formation. Using neutron reflection, we have found for one liquid crystal that different types of surface induce different amounts of smectic layering. This suggests that the surface is not merely a hard wall, but can promote or reduce the degree of smectic layering. In previous INTER experiments we have measured the effect of varying the liquid crystal at the air interface. The key objective here is to complete the experimental matrix of observations by measuring the of the degree of smectic layering for different surfaces for second liquid crystal.