How to create instance of Sobject dynamically if you don’t know which sobject is going to be instantiated?

public SObject getNewSobject(String t)
{

// Call global describe to get the map of string to token.
Map<String, Schema.SObjectType> gd = Schema.getGlobalDescribe();

// Get the token for the sobject based on the type.
Schema.SObjectType st = gd.get(t);

// Instantiate the sobject from the token.
Sobject s = st.newSobject();

return s;
}