Update source/release-notes/2.4.txt

Author: matulef

source/release-notes/2.4.txt

@@ -354,30 +354,30 @@ the :program:`mongo` shell that resembles the following:
 
 This operation shards the ``active`` collection in the ``records``
 database, using a hash of the ``a`` field as the shard
-key. Consider the following properties when a hashed shard key:
+key. Consider the following properties when using a hashed shard key:
 
 - As with other kinds of shard key indexes, if your collection has
-  data, you must create the hashed index before sharding. If you
+  data, you must create the hashed index before sharding. If your
   collection does not have data, sharding the collection will create
   the appropriate index.
 
-- The :program:`mongos` can route all equality queries to a specific
-  shards or set of shards using the hashed index; however, the
-  :program:`mongos` must route range queries to all shards.
+- The :program:`mongos` will route all equality queries to a specific
+  shard or set of shards; however, the :program:`mongos` must route 
+  range queries to all shards.
 
 - When using a hashed shard key on a collection without data, MongoDB
   automatically pre-splits the range of 64-bit hash values into
   chunks. By default, the initial number of chunks is equal to twice
   the number of shards at creation time. You can change the number of
   chunks created, using the ``numInitialChunks`` option, as in the
-  following invocation of ``numInitialChunks``:
+  following invocation of ``shardCollection``:
 
   .. code-block:: javascript
 
-     db.adminCommand( { shardCollection: "test.collection", key: { a: "hashed"}, numInitialChunks: 9001 } )
+     db.adminCommand( { shardCollection: "test.collection", key: { a: "hashed"}, numInitialChunks: 2001 } )
 
 .. warning::
 
-   Avoid using hashed shard keys when the hashed field has floating
+   Avoid using hashed shard keys when the hashed field has non-integral floating
    point values, see :ref:`hashed indexes <hashed-index-warning>` for
    more information.