--- a/src/Grids/curvilinear_grid.jl	Fri Dec 01 15:01:44 2023 +0100
+++ b/src/Grids/curvilinear_grid.jl	Fri Feb 16 10:28:02 2024 +0100
@@ -2,7 +2,7 @@
 struct CurvilinearGrid{T,D, GT<:Grid{<:Any,D}, CT<:AbstractArray{T,D}, JT<:AbstractArray{<:AbstractArray{<:Any, 2}, D}} <: Grid{T,D}
     logicalgrid::GT
     physicalcoordinates::CT
-    jacobian::JT
+    jacobian::JT # TBD: currectly ∂xᵢ/∂ξⱼ. Is this the correct index order?
 end
 
 jacobian(g::CurvilinearGrid) = g.jacobian
@@ -38,8 +38,6 @@
     )
 end
 
-
-
 # Do we add a convenience function `curvilinear_grid`? It could help with
 # creating the logical grid, evaluating functions and possibly calculating the
 # entries in the jacobian.